MATHS(Q) - TeachGyan

CHAPTER –1 NUMBER SYSTEMSRead More➔🠔Read Less

Multiple Choice Questions (MCQs):

Which of the following is an irrational number? a) 3/4 b) √9 c) -5 d) 0.6…
If x is an irrational number and y is a rational number, what is the nature of the product xy? a) Rational b) Irrational c) Integer d) Whole number
The sum of two consecutive odd numbers is always: a) Odd b) Even c) Prime d) A perfect square
If p and q are integers, when is the fraction p/q considered an integer? a) When p is a multiple of q b) When q is a multiple of p c) When p and q are both even d) When p and q are both odd

True/False Questions:

The square root of any positive integer is always irrational. (True/False)
A prime number has exactly two factors. (True/False)
Every whole number is a natural number. (True/False)
The sum of two rational numbers is always rational. (True/False)

Fill in the Blanks:

The ________ of two irrational numbers can be rational.
The product of any two consecutive integers is always ________.
The square root of 25 is ________.
The number 0 is a ________ number.

Match the Following:

Match the type of number with its example.
- Rational number A. √2
- Irrational number B. -7
- Whole number C. 3/4
- Integer D. 11

Short Answer Questions:

Express 5/8 as a decimal.
Find three consecutive odd integers whose sum is 57.
If p is an irrational number, is -p also irrational? Justify your answer.
Differentiate between natural numbers and whole numbers.

Long Answer Questions:

Prove that the square root of any prime number is irrational.
Explain the concept of a number line and how it is used to represent different types of numbers.
Solve the equation: 2(x – 4) + 5 = 3x – 7

Application-Based Questions:

A rectangular garden is 24 meters long and 18 meters wide. Determine the length of the longest rope that can be used to fence the garden.
A recipe calls for 3/4 cup of sugar. If you want to make half of the recipe, how much sugar do you need?
A student spends 1/4 of his time studying mathematics. If he studies for 8 hours each day, how many hours does he spend on mathematics?
Multiple Choice Questions (MCQs):
1. Which of the following is not a rational number? a) 0.25 b) -3 c) √16 d) 5/2
2. If a and b are integers, where a ≠ 0, which of the following expressions is always irrational? a) a/b b) b/a c) a + b d) √a
3. The product of two irrational numbers is always: a) Rational b) Irrational c) An integer d) Undefined
4. What is the sum of the first 20 natural numbers? a) 200 b) 210 c) 220 d) 230
True/False Questions:
1. The product of an irrational number and a rational number is always irrational. (True/False)
2. Zero is an even number. (True/False)
3. Every prime number greater than 2 can be expressed as the sum of two prime numbers. (True/False)
4. The square root of 1 is an imaginary number. (True/False)
Fill in the Blanks:
1. The reciprocal of a non-zero rational number is always ________.
2. The number ________ is neither prime nor composite.
3. The decimal representation of a rational number always terminates or repeats after a certain number of ________.
4. The sum of two irrational numbers may be ________.
Match the Following:
1. Match the type of number with its example.
  - Rational number A. 4
  - Irrational number B. -√9
  - Whole number C. 1.5
  - Integer D. 2/3
Short Answer Questions:
1. Find the smallest prime number greater than 20.
2. If √x = 5, find the value of x.
3. Express 3/5 as a percentage.
4. Solve for x: 2x – 7 = 3(x + 4)
Long Answer Questions:
1. Prove that the square of any even integer is divisible by 4.
2. Explain the concept of a recurring decimal with an example.
3. Solve the inequality: 2x – 5 < 3x + 1
4. Write the steps involved in the Euclidean Division Algorithm and use it to find the HCF of 48 and 64.
Application-Based Questions:
1. A train travels at a speed of 60 km/h. How far will it travel in 3 hours?
2. The perimeter of a rectangle is 36 cm, and its length is 12 cm. Find its width.
3. A group of friends wants to distribute 120 chocolates equally among themselves. If there are 8 friends, how many chocolates will each receive?
4. A square field has an area of 144 square meters. Determine the length of each side.
Feel free to adapt these questions based on your classroom needs and the level of your students. These questions cover a variety of difficulty levels and types, promoting a comprehensive understanding of the “Number Systems” chapter in Class 9 Mathematics.

CHAPTER–2 POLYNOMIALSRead More➔🠔Read Less

Section A: Multiple Choice Questions (1-30)

The expression 3x^2 – 2x + 5 is a: a) Monomial b) Binomial c) Trinomial d) Polynomial
What is the degree of the polynomial 4x^3 – 2x^2 + 7x – 1? a) 3 b) 2 c) 4 d) 1
If $(2 x - 1) (3 x + 2) = 0$ , what are the roots of the equation? a) x = 1/2, x = -2/3 b) x = 1/2, x = 2/3 c) x = -1/2, x = 2/3 d) x = 1/2, x = -2/3
Expand and simplify: $(x - 2) (x^{2} + 3 x + 5)$ . a) $x^{3} - x^{2} - 4 x - 10$ b) $x^{3} - x^{2} + 4 x + 10$ c) $x^{3} + x^{2} - 4 x - 10$ d) $x^{3} + x^{2} + 4 x + 10$

Section B: Fill in the Blanks (31-50)

The degree of a constant term is ___________.
A polynomial with four terms is called a ___________.
The product of a binomial and a trinomial results in a ___________.
The coefficient of $x^{2}$ in the polynomial $3 x^{3} + 2 x^{2} - 5 x + 1$ is ___________.

Section C: True/False and Justification (51-65)

$(2 x + 3)^{2}$ is a trinomial. a) True b) False Justification: ___________
The sum of the coefficients in the polynomial $4 x^{2} - 2 x + 7$ is 9. a) True b) False Justification: ___________

Section D: Short Answer Questions (66-80)

Identify the term of degree 4 in the polynomial $2 x^{4} - 3 x^{3} + 7 x^{2} - 5 x + 1$ .
Simplify: $(x - 2)^{2} - (x + 3) (x - 1)$ .

Section E: Application-Based Questions (81-90)

The area of a rectangular garden is given by $A (x) = 2 x^{2} + 3 x - 5$ . Find the dimensions of the garden if its length is $(x - 1)$ meters.
The sum of two consecutive integers is 27. Express this situation using a polynomial equation.
Section A: Multiple Choice Questions (1-30)
1. The expression $2 x^{2} + 3 x - 4$ is a: a) Monomial b) Binomial c) Trinomial d) Quadrinomial
2. What is the constant term in the polynomial $5 x^{2} - 2 x + 7$ ? a) 5 b) -2 c) 7 d) 0
3. If $(x + 4) (x - 3) = 0$ , what are the roots of the equation? a) x = -4, x = 3 b) x = 4, x = -3 c) x = -4, x = -3 d) x = 4, x = 3
4. Simplify: $2 x^{2} - (x^{2} - 3 x + 1)$ . a) $x^{2} + 3 x - 1$ b) $x^{2} - 3 x + 1$ c) $x^{2} - x + 1$ d) $x^{2} + x - 1$
Section B: Fill in the Blanks (31-50)
1. The sum of the degrees of the monomials in the polynomial $2 x^{3} - 4 x^{2} + 7$ is ___________.
2. A polynomial with only one term is called a ___________.
3. The coefficient of $x$ in the polynomial $3 x^{2} - 2 x + 5$ is ___________.
4. If $(x - a) (x + b) = x^{2} + x - 6$ , what are the values of $a$ and $b$ ? a) $a = - 3, b = 2$ b) $a = 3, b = - 2$ c) $a = - 3, b = - 2$ d) $a = 3, b = 2$
Section C: True/False and Justification (51-65)
1. The polynomial $2 x^{2} - 5 x + 1$ has two distinct real roots. a) True b) False Justification: ___________
2. The product of two polynomials is always a trinomial. a) True b) False Justification: ___________
Section D: Short Answer Questions (66-80)
1. Find the sum of the coefficients in the polynomial $4 x^{3} - 2 x^{2} + 7 x - 1$ .
2. Factorize the polynomial $x^{2} - 5 x + 6$ .
Section E: Application-Based Questions (81-90)
1. The length of a rectangular field is $2 x + 3$ meters, and the width is $x - 1$ meters. Write an expression for the area of the field.
2. The sum of the areas of two squares is $25 x^{2} - 4$ . Express this situation using a polynomial equation.
Feel free to adapt or modify these questions based on the specific requirements of your classroom or examination setting.

CHAPTER–3 COORDINATE GEOMETRYRead More➔🠔Read Less

Questions:

Basics of Coordinates: a. What are the coordinates of the point A(3, -5)? b. If a point is on the y-axis, what is the value of its x-coordinate?
Plotting Points: a. Plot the points P(4, 2) and Q(-3, 5) on a coordinate plane. b. Identify the quadrant in which the point (-2, -7) lies.
Distance Calculation: a. Find the distance between points A(1, 2) and B(7, 8). b. If C(3, 4) is the midpoint of a line segment AB, and A is (1, 2), find the coordinates of B.
Midpoint Calculation: a. Find the midpoint of the line segment joining D(-2, 6) and E(4, -3). b. If the midpoint of line segment PQ is (-1, 3), and P is (2, 6), find the coordinates of Q.
Real-life Applications: a. Explain how coordinate geometry is used in navigation systems. b. If a city map has the coordinates of two parks as (5, 7) and (-3, 2), find the distance between the parks.
Perimeter of Figures: a. The vertices of a triangle are given as (1, 2), (4, 5), and (7, 2). Find the perimeter. b. Determine the perimeter of a square with vertices at (0, 0), (0, 4), (4, 4), and (4, 0).
Ratio and Division: a. If the point M divides the line segment AB in the ratio 2:3 and A is (-1, 4), find the coordinates of M. b. The point N divides the line segment PQ in the ratio 3:1, with P(2, 1). Find the coordinates of Q.
Parallel and Perpendicular Lines: a. Determine the equation of a line passing through (3, 5) and parallel to the x-axis. b. Find the equation of a line perpendicular to the line y = 2x + 1 passing through the point (1, 3).
Quadrilateral Properties: a. Given the vertices A(2, 3), B(5, 1), C(7, 6), and D(4, 8), is ABCD a rectangle? Justify your answer. b. Plot the points E(2, 2), F(4, 4), G(7, 1), and H(5, -1). Connect them to form a figure. Is it a square? Why or why not?
Coordinate Geometry in 3D: a. How is coordinate geometry extended to three dimensions? b. Given a point in three-dimensional space, P(2, -3, 1), what are its coordinates?
1. Decimal Coordinates: a. Plot the point R(2.5, -1.5) on the coordinate plane. b. Explain how the coordinates of a point change if it is reflected across the x-axis.
2. Finding Unknown Coordinates: a. If the coordinates of point Q are (x, 3) and it lies on the y-axis, what is the value of x? b. The midpoint of line segment LM is (3, 4), and L is (1, 6). Find the coordinates of point M.
3. Distance and Midpoint in Word Problems: a. A ship is at coordinates (2, 5) and another ship is at (-3, 1). Find the distance between them. b. The midpoint of a line segment is (4, -2), and one endpoint is (6, 1). Find the other endpoint.
4. Slope of a Line: a. Calculate the slope of a line passing through points (2, 3) and (5, 7). b. Determine the type of slope a horizontal line has.
5. Equation of a Line: a. Write the equation of a line with a slope of 2 passing through the point (1, -3). b. Find the equation of a vertical line passing through the point (-4, 6).
6. Application of Distance Formula: a. A rectangle has vertices at (1, 2), (1, 6), (5, 6), and (5, 2). Find the length of its diagonal. b. Explain how the distance formula is used to find the length of a line segment.
7. Coordinate Geometry and Trigonometry: a. If point A is at (3, 4), find the angle it makes with the positive x-axis. b. How can trigonometry concepts be applied to coordinate geometry?
8. Polar Coordinates: a. Explain the concept of polar coordinates. b. Convert the point with Cartesian coordinates (3, 4) to polar coordinates.
9. Symmetry in Coordinate Geometry: a. Determine if the point (2, -5) has symmetry with respect to the x-axis, y-axis, or the origin. b. How can you check for symmetry in a figure using its coordinates?
10. Analyzing Graphs: a. Sketch the graph of the equation $y = - 2 x + 3$ . b. Identify the x-intercept and y-intercept of the line represented by the equation.
Feel free to use these questions as they are or modify them to suit your specific teaching objectives!

CHAPTER–4 LINEAR EQUATIONS IN TWO VARIABLESRead More➔🠔Read Less

Multiple Choice Questions (MCQs):

Which of the following equations represents a linear equation in two variables? a) $3 x - 2 y = 7$ b) $y^{2} = 4 x$ c) $2 x + 3 = 5$ d) $2 x + 3 y = 6$
If the graph of a linear equation is a line, then the solution to the equation is: a) A point b) An arc c) A curve d) A plane
What is the slope of a line parallel to the x-axis? a) 0 b) Undefined c) 1 d) -1

True/False Questions:

True/False: Every point on the graph of a linear equation represents a solution to that equation.
True/False: The solution to a system of linear equations must satisfy all the equations in the system simultaneously.

Fill in the Blanks:

The slope of a vertical line is ________.
The solution to a system of equations is the point of ________.

Short Answer Questions:

Write the equation of a line with a slope of 2 passing through the point (3, 4).
Solve the system of equations: $2 x - y = 7$
$3 x + 2 y = 11$

Matching Questions:

Match the equation with its graph.

$y = 2 x + 3$
$3 x - y = 6$
$y = - 2 1 x + 4$
$2 y + 4 x = 8$

Application Problems:

The sum of two consecutive odd numbers is 44. Find the numbers.
A rectangle has a length that is 4 units more than twice its width. If the perimeter is 24 units, find the length and width.

Graphical Questions:

Graph the equation $y = - 2 3 x + 5$ on the provided coordinate system.
Identify the point of intersection of the lines $2 x + y = 8$ and $y = x - 3$ .

Word Problems:

The cost of 2 pens and 3 pencils is Rs. 30. The cost of 5 pens and 4 pencils is Rs. 70. Find the cost of one pen and one pencil.
The sum of two numbers is 16. If twice the larger number is subtracted from four times the smaller number, the result is 8. Find the numbers.

Matrix Questions:

Represent the system of equations $3 x - 2 y = 5$ and $2 x + y = 7$ as a matrix.

Revision Questions:

Solve for $y$ : $4 y - 3 = 2 x + 5$
Write the equation of a line perpendicular to $y = 3 x - 2$ passing through the point (2, 4).

Advanced Questions:

Determine the conditions under which a system of linear equations has no solution.
Express the solution to the system $3 x - 2 y = 8$ and $5 x + 3 y = 12$ geometrically.
Multiple Choice Questions (MCQs):
1. The solution to the system of equations $2 x + y = 5$ and $3 x - 2 y = 8$ is: a) $x = 2, y = 1$ b) $x = 1, y = 2$ c) $x = 3, y = - 1$ d) No solution
2. The equation of a line parallel to the y-axis is: a) $y = m x + c$ b) $x = k$ c) $y = k x$ d) $y = x^{2}$
True/False Questions:
1. True/False: A system of linear equations can have exactly one solution, infinitely many solutions, or no solution.
2. True/False: The point of intersection of two lines is a solution to both equations.
Fill in the Blanks:
1. The x-intercept of a line is found by setting $y$ equal to ________.
2. The system of equations $2 x + y = 7$ and $4 x - 2 y = 14$ is an example of a(n) ________ system.
Short Answer Questions:
1. Determine the solution to the system of equations: $3 y - 2 x = 5$ $5 x + 2 y = 11$
2. If $y = 2 x - 3$ is perpendicular to another line, what is the slope of that line?
Matching Questions:
Match the system of equations with the method used to solve it.
- $3 x + 2 y = 8$ , $5 x - y = 11$
- $2 x + 3 y = 7$ , $4 x - 2 y = 14$
- $y = 2 x + 3$ , $3 x - y = 6$
Methods: a) Graphical method b) Substitution method c) Elimination method
Application Problems:
1. The sum of the digits of a two-digit number is 9. If the digit in the unit’s place is twice the digit in the ten’s place, find the number.
2. The ages of two friends are in the ratio 3:5. If the sum of their ages is 40, find their ages.
Graphical Questions:
1. Graph the system of equations and find the point of intersection: $y = - x + 5$ $2 x + y = 8$
2. Identify the type of system of equations based on the graph: consistent and independent, consistent and dependent, or inconsistent.
Word Problems:
1. The sum of three consecutive even integers is 72. Find the integers.
2. The perimeter of a rectangle is 26 cm. If its length is 2 cm more than twice its width, find the dimensions of the rectangle.
Matrix Questions:
1. Solve the system of equations using matrices: $[23 1-2] [x y] = [58]$
Revision Questions:
1. Write the equation of a line in standard form if its slope is $4 3$ and it passes through the point (2, 5).
2. Determine the values of $x$ and $y$ in the system of equations: $2 x + 3 y = 11$ $4 x - y = 5$
Advanced Questions:
1. Explain the relationship between the slopes of parallel lines and the slopes of perpendicular lines.
2. Solve the system of equations using the substitution method: $3 x - 2 y = 7$ $y = x - 2$
Feel free to use, modify, or adapt these questions to suit the needs of your class and curriculum.

CHAPTER–5 INTRODUCTION TO EUCLID’S GEOMETRYRead More➔🠔Read Less

Multiple Choice Questions (MCQs):

Euclid’s Geometry is named after: a) Aristotle b) Euclid c) Pythagoras d) Archimedes
Which of the following is a postulate in Euclid’s Geometry? a) The sum of the angles of a triangle is 180 degrees. b) Two lines perpendicular to the same line are parallel. c) A line can be extended infinitely in both directions. d) The angles opposite to equal sides of a triangle are equal.
In Euclidean geometry, two circles are congruent if they have: a) Equal radii b) Equal circumferences c) Equal areas d) Equal diameters

True/False Questions:

True/False: Euclid’s fifth postulate states that if a straight line falling on two straight lines makes the interior angles on the same side less than two right angles, then the two straight lines, if produced indefinitely, meet on that side on which the angles are less than two right angles.
True/False: The angles opposite to the equal sides of an isosceles triangle are equal.

Fill in the Blanks:

Euclid’s Geometry is based on a set of fundamental __________ and ___________.
In Euclid’s Geometry, a line segment can be extended indefinitely in __________ directions.

Short Answer Questions:

Explain the significance of Euclid’s Geometry in the development of mathematics.
State Euclid’s first postulate and provide an example to illustrate it.

Descriptive Questions:

Prove that the angles opposite to equal sides of a triangle are equal using Euclid’s axioms.
Describe the process of constructing an equilateral triangle using a compass and straightedge.

Application-based Questions:

If two lines are cut by a transversal, and the alternate interior angles are equal, what can you conclude about the lines?
Given a rectangle ABCD, if the measure of angle A is 90 degrees, prove that the opposite sides are equal.

Diagram-based Questions:

Draw a circle and label its parts: center, radius, and diameter.
Construct an angle of 75 degrees using a compass and straightedge.

Problem-solving Questions:

The interior angles of a triangle are in the ratio 3:4:5. Find the measures of each angle.
A parallelogram has one angle measuring 120 degrees. Find the measure of its adjacent angle.

Higher-order Thinking Questions:

Can there be a triangle with angles measuring 30, 60, and 90 degrees? Justify your answer.
Critically evaluate Euclid’s parallel postulate and discuss its implications.
Multiple Choice Questions (MCQs):
1. Which of Euclid’s postulates deals with the existence of a straight line? a) First b) Second c) Third d) Fourth
2. In a triangle ABC, if ∠A = 50° and ∠B = 70°, what is the measure of ∠C? a) 60° b) 70° c) 80° d) 90°
3. If a line segment is divided into two equal parts, what is the ratio of the lengths of the two parts? a) 1:2 b) 1:1 c) 2:1 d) 3:1
True/False Questions:
1. True/False: In Euclid’s Geometry, all right angles are equal.
2. True/False: If a line is drawn parallel to one side of a triangle, it divides the other two sides proportionally.
Fill in the Blanks:
1. The sum of the angles in a triangle is always ________ degrees.
2. A straight line can be drawn between any two points, according to Euclid’s __________ postulate.
Short Answer Questions:
1. Explain the concept of a “straight angle” in Euclid’s Geometry.
2. State and explain Euclid’s Common Notions.
Descriptive Questions:
1. Compare and contrast Euclidean geometry with non-Euclidean geometry.
2. Discuss the application of geometry in real-life situations using examples.
Application-based Questions:
1. Given a quadrilateral ABCD with ∠A = 90°, ∠B = 80°, and ∠C = 100°, is it a parallelogram? Justify your answer.
2. If two circles intersect at two points, what can you say about the chords connecting these points?
Diagram-based Questions:
1. Draw an acute-angled triangle and label its vertices as A, B, and C. Measure and write the angles next to them.
2. Construct a square given one side using a compass and straightedge.
Problem-solving Questions:
1. The perimeter of a rectangle is 36 cm, and its length is 12 cm. Find its width.
2. If a triangle has sides of lengths 7 cm, 24 cm, and 25 cm, is it a right-angled triangle?
Higher-order Thinking Questions:
1. Critically analyze the role of Euclid’s axioms in the development of geometry.
2. Can a polygon have both an interior angle of 160 degrees and an exterior angle of 40 degrees? Explain.
Feel free to use these questions to create a diverse and challenging worksheet for your students.

CHAPTER–6 LINES AND ANGLESRead More➔🠔Read Less

Multiple Choice Questions (MCQs):

What do you call two lines that never meet? a) Parallel lines b) Perpendicular lines c) Intersecting lines d) Collinear lines
In a right-angled triangle, the side opposite the right angle is called: a) Hypotenuse b) Adjacent side c) Opposite side d) None of the above
If ∠A + ∠B = 180°, the type of angle pair is: a) Complementary b) Supplementary c) Adjacent d) Vertical angles

True/False Questions:

Two lines perpendicular to the same line are parallel. (True/False)
The angles opposite each other when two lines intersect are called corresponding angles. (True/False)

Short Answer Questions:

Define a straight angle.
If two angles are complementary, and one angle is 40°, find the measure of the other angle.

Matching Questions:

Match the angle type with its definition:
- Acute angle
- Obtuse angle
- Right angle
- Straight angle
Definitions: a) An angle greater than 90° b) An angle exactly equal to 90° c) An angle less than 90° d) An angle of 180°

Diagram-based Questions:

Draw an example of intersecting lines and label the angles formed.
Given two parallel lines cut by a transversal, label the corresponding angles.

Problem-Solving Questions:

The sum of the angles of a quadrilateral is 360°. If three angles are 80°, 100°, and 70°, find the measure of the fourth angle.
In triangle ABC, ∠A = 50° and ∠B = 75°. Find the measure of ∠C.

Proof and Justification Questions:

Prove that the diagonals of a rectangle are equal.
Using the properties of parallel lines, prove that alternate interior angles are congruent.

Practical Application Questions:

Measure the angles of a door frame in your classroom. Classify each angle as acute, obtuse, or right.
1. In a right-angled triangle, the side opposite the right angle is called: a) Base b) Hypotenuse c) Adjacent side d) None of the above
2. Which of the following statements is true? a) All right angles are equal. b) All acute angles are equal. c) All obtuse angles are equal. d) None of the above.
True/False Questions:
1. The diagonals of a parallelogram bisect each other. (True/False)
2. If two angles are supplementary, one angle must be acute. (True/False)
Short Answer Questions:
1. If ∠A = 30° and ∠B = 60°, what is the measure of ∠C in a triangle?
2. Define a transversal in the context of lines and angles.
Matching Questions:
1. Match the angle pair with its relationship:
- Corresponding angles
- Alternate interior angles
- Vertical angles
- Supplementary angles
Relationships: a) Angles that share a common arm but no common interior points. b) Angles on opposite sides of the transversal. c) Angles formed by intersecting lines. d) Angles that add up to 180°.
Diagram-based Questions:
1. Draw an example of perpendicular lines and label the right angles formed.
2. Given a pair of intersecting lines, mark and label vertically opposite angles.
Problem-Solving Questions:
1. The exterior angle of a triangle is 110°, and one of the interior angles is 40°. Find the measure of the other two interior angles.
2. In a parallelogram ABCD, if ∠A = 120°, find the measure of ∠B.
Proof and Justification Questions:
1. Prove that opposite angles of a parallelogram are equal.
2. Using the angle sum property, prove that the sum of the angles in any quadrilateral is 360°.
Practical Application Questions:
1. Measure the angles of a window frame in your classroom. Classify each angle as acute, obtuse, or right.
2. Explain a real-life scenario where understanding angles is crucial.
Feel free to customize these questions according to the specific requirements and complexity level of your class.

CHAPTER–7TRIANGLESRead More➔🠔Read Less

Objective Questions:

What is the sum of the angles in a triangle?
- a) 90 degrees
- b) 180 degrees
- c) 360 degrees
- d) 120 degrees
In triangle XYZ, if ∠X = 50° and ∠Y = 70°, find ∠Z.
Which type of triangle has all sides of different lengths?
- a) Equilateral
- b) Isosceles
- c) Scalene
- d) Right-angled
If two angles of a triangle are 45° and 75°, find the third angle.
In triangle PQR, if PQ = QR, the triangle is:
- a) Equilateral
- b) Isosceles
- c) Scalene
- d) Right-angled

Fill in the Blanks:

The angles of a triangle always add up to ______ degrees.
In an equilateral triangle, all angles are _______.
In a right-angled triangle, the side opposite the right angle is called the _______.
If a triangle has sides of lengths 5 cm, 12 cm, and 13 cm, it is a _______ triangle.
The sum of the angles in a quadrilateral is _______ degrees.

True/False Statements:

All equilateral triangles are also isosceles.
A triangle with angles 30°, 60°, and 90° is an obtuse triangle.
If the sum of two angles in a triangle is 90°, the third angle must be 90°.
The sides opposite equal angles in a triangle are also equal.
All right-angled triangles are scalene.

Short Answer Questions:

Define an acute-angled triangle.
Explain the Triangle Inequality Theorem.
If two angles of a triangle are 40° and 60°, can the third angle be 100°? Justify your answer.
What is the area of a triangle with base 8 cm and height 10 cm?
State the Pythagorean Theorem.

Problem-Solving Questions:

The angles of a triangle are in the ratio 2:3:5. Find the measures of each angle.
In triangle ABC, ∠A = 50°, and ∠B = 70°. Find ∠C.
The perimeter of a triangle is 24 cm. If one side is 8 cm and the other is 10 cm, find the length of the third side.
A triangle has sides of lengths 7 cm, 24 cm, and 25 cm. Is it a right-angled triangle?
The base of a triangle is 12 cm, and the corresponding height is 15 cm. Find the area of the triangle.

Construction Problems:

Construct an equilateral triangle ABC with side length 6 cm.
Construct an isosceles triangle PQR with PQ = PR = 5 cm and ∠P = 40°.
Construct a right-angled triangle XYZ with ∠X = 90°, and the hypotenuse XY = 8 cm.
Construct a triangle MNO with sides MO = 4 cm, NO = 6 cm, and ∠M = 60°.
Construct a triangle STU with sides ST = 7 cm, TU = 9 cm, and US = 5 cm.
Multiple Choice Questions:
1. Which of the following is the Pythagorean triple?
- a) 3, 4, 5
- b) 5, 12, 13
- c) 7, 24, 25
- d) 8, 15, 17
1. If two angles of a triangle are equal, what is the type of triangle?
- a) Acute-angled
- b) Isosceles
- c) Equilateral
- d) Scalene
1. In triangle ABC, if ∠A = 90° and ∠B = 45°, find ∠C.
2. What is the sum of the interior angles of a hexagon?
3. If a triangle has sides of lengths 9 cm, 12 cm, and 15 cm, what type of triangle is it?
True/False Statements:
1. The sum of the angles in a quadrilateral is 360 degrees.
2. An isosceles triangle can also be equilateral.
3. If two angles of a triangle are congruent, the sides opposite those angles are also congruent.
4. All equilateral triangles are acute-angled.
5. In a scalene triangle, all sides are of different lengths.
Short Answer Questions:
1. Explain why the sum of the interior angles of any polygon is given by (n-2) * 180°, where n is the number of sides.
2. If the base of a triangle is 10 cm, and the area is 30 cm², what is the height?
3. State the conditions under which two triangles are similar.
4. If the perimeter of a triangle is 18 cm and one side is 6 cm, find the other two sides.
5. What is the exterior angle of a triangle? How is it related to its remote interior angles?
Problem-Solving Questions:
1. The angles of a triangle are in the ratio 3:4:5. If the smallest angle is 30°, find the measures of all three angles.
2. A triangle has sides of lengths 8 cm, 15 cm, and 17 cm. Determine whether it is a right-angled triangle.
3. The perimeter of an isosceles triangle is 30 cm. If one of the equal sides is 12 cm, find the length of the third side.
4. The base of a triangle is 14 cm, and the corresponding height is 8 cm. Find the area of the triangle.
5. In triangle PQR, if PQ = 5 cm, QR = 12 cm, and the angle between PQ and QR is 90°, find the area of the triangle.
Construction Problems:
1. Construct an isosceles triangle ABC with base BC = 5 cm and ∠B = ∠C = 60°.
2. Construct a triangle DEF with sides DE = 6 cm, EF = 8 cm, and ∠D = 45°.
3. Construct a triangle LMN with sides LM = 7 cm, MN = 9 cm, and LN = 12 cm.
4. Construct an equilateral triangle XYZ with a side length of 4 cm.
5. Construct a triangle UVW with sides UV = 5 cm, VW = 6 cm, and UW = 7 cm.
These additional questions cover a range of topics within the “Triangles” chapter, providing a comprehensive set for your students.

CHAPTER–8 QUADRILATERALSRead More➔🠔Read Less

Identify the type of quadrilateral: ABCD with AB || CD and AD = BC.
Determine the value of x in LMNO, where ∠L = 70°, ∠M = 100°, and ∠O = x°.
If PQRS is a rectangle with PQ = 6 cm, what is the length of SR?
Classify the quadrilateral WXYZ with WX = 8 cm and WY = 6 cm.
Find the length of AD in the parallelogram ABCD, where AB = 8 cm, BC = 12 cm, and ∠B = 110°.
In the trapezium PQRS, PQ = 8 cm, QR = 12 cm, PS = 15 cm, find the length of side RS.
Calculate the perimeter of a quadrilateral ABCD with AB = 10 cm, BC = 12 cm, AD = 8 cm.
If the diagonals of a kite KLMN are KL = 10 cm and MN = 12 cm, find the length of KM.
Determine the measures of the angles in a rhombus with side lengths 5 cm, 5 cm, 10 cm, and 10 cm.
Solve for x in the parallelogram PQRS, where ∠P = 80°, ∠Q = 2x°, and ∠R = 3x°.
Find the length of side CD in quadrilateral ABCD if the perimeter is 48 cm, AB = 10 cm, BC = 12 cm, AD = 8 cm.
Given a rhombus with diagonals of 14 cm, find the length of each diagonal.
Determine the type of quadrilateral ABCD if AB || CD, AD = 5 cm, BC = 8 cm, ∠A = 40°, and ∠D = 130°.
In quadrilateral PQRS, PQ = 6 cm, QR = 8 cm, ∠Q = 110°, and ∠R = 70°. Calculate the length of diagonal PS.
Classify the quadrilateral EFGH with EF = 7 cm and ∠E = 90°.
Calculate the length of the side RS in a trapezium PQRS with PQ = 8 cm, QR = 12 cm, PS = 15 cm, and ∠P = 90°.
Find the length of the diagonal XO in quadrilateral LMNO if LX = 4 cm, MX = 6 cm, and NO = 10 cm.
Determine the length of sides KM and LN in a kite KLMN with diagonals KL = 10 cm and MN = 12 cm.
If the lengths of the sides of a rhombus are 5 cm, 5 cm, 10 cm, and 10 cm, find the length of its diagonals.
Identify the type of quadrilateral ABCD if AB || CD, AD = 5 cm, BC = 8 cm, ∠A = 40°, and ∠D = 130°.
1. In quadrilateral ABCD, if AB = 2x + 5, BC = 3x – 1, CD = 4x + 2, and AD = 5x – 3, find the values of x and classify the quadrilateral.
2. Determine the type of quadrilateral if the opposite angles are equal, and each angle measures 90°.
3. If a quadrilateral has consecutive angles of 80°, 100°, 80°, and 100°, what is the type of the quadrilateral?
4. Calculate the area of a rhombus with diagonals of lengths 10 cm and 12 cm.
5. Given a quadrilateral with angles of 110°, 70°, 100°, and 80°, determine the type of quadrilateral.
6. In a parallelogram PQRS, if ∠P = 60°, find the measures of ∠Q, ∠R, and ∠S.
7. The diagonals of a rectangle are 15 cm and 20 cm. Find the perimeter of the rectangle.
8. If a quadrilateral is both a parallelogram and a rhombus, what can you conclude about its sides and angles?
9. Solve for x if the quadrilateral ABCD is a kite, and ∠A = 3x, ∠B = 4x, and ∠C = 2x.
10. If a quadrilateral ABCD is cyclic, and ∠A = 70°, ∠B = 110°, find the measures of ∠C and ∠D.
11. Determine the type of quadrilateral ABCD if AB = 6 cm, BC = 8 cm, CD = 6 cm, and AD = 8 cm.
12. In trapezium ABCD, if AB || CD, ∠A = 80°, ∠C = 100°, and AD = 10 cm, find the length of BC.
13. Find the length of the diagonals in a square if the side length is 9 cm.
14. If the diagonals of a quadrilateral are equal and bisect each other at right angles, what is the type of the quadrilateral?
15. Calculate the length of side BC in a trapezium PQRS with PQ = 6 cm, SR = 10 cm, PS = 8 cm, and QR = 12 cm.
16. If a quadrilateral is both a rectangle and a rhombus, what can you say about its angles and sides?
17. Given a parallelogram ABCD with ∠A = 120°, find the measures of ∠B, ∠C, and ∠D.
18. In a rhombus, if one side is 7 cm, find the lengths of the diagonals.
19. Determine the type of quadrilateral if one pair of opposite sides is equal and parallel, and the other pair is unequal and non-parallel.
20. In trapezium ABCD, if AB || CD, ∠A = 70°, ∠B = 110°, and AD = 12 cm, find the length of BC.
Feel free to mix and match these questions based on the complexity you desire for your worksheet.

CHAPTER–9 CIRCLESRead More➔🠔Read Less

Definitions and Basic Concepts:

Define a circle.
What is the difference between the radius and the diameter of a circle?
Explain what a chord is in relation to a circle.
Define the circumference of a circle.
What is the relationship between the radius and the circumference of a circle?

Calculations:

If the radius of a circle is 10 cm, calculate its diameter.
Given the diameter of a circle is 14 cm, find its radius.
Calculate the circumference of a circle with a diameter of 21 cm.
Find the area of a circle with a radius of 5 cm.
If the circumference of a circle is 66 cm, find its diameter.
A circle has a radius of 8 cm. Calculate its area.

Arcs and Angles:

Define a central angle in a circle.
If an arc in a circle measures 60 degrees, what is its central angle?
Given a circle with a central angle of 90 degrees, find the measure of its intercepted arc.
If the measure of an arc is 120 degrees, what is the measure of its central angle?

Angles in Circles:

Define an inscribed angle in a circle.
If an inscribed angle in a circle measures 45 degrees, what is the measure of its intercepted arc?
Given an inscribed angle of 60 degrees, find the measure of the arc it intercepts.
Explain the relationship between the central angle and the inscribed angle when both intercept the same arc.

Properties of Tangents:

Define a tangent to a circle.
What is the relationship between the radius of a circle and a line tangent to the circle?
If the radius of a circle is 12 cm, find the length of a tangent drawn to the circle.

Construction and Theorems:

Explain the process of constructing the circumcircle of a triangle.
State and prove the inscribed angle theorem.
State and prove the alternate segment theorem.

Real-Life Applications:

Provide an example of how circles are used in architecture.
Explain how the concept of circles is applied in navigation.
Discuss the role of circles in the design of wheels.

Miscellaneous:

If the radius of a circle is doubled, how does it affect the area?
How does the length of an arc change if the central angle is increased?
Given two circles with radii of 5 cm and 8 cm, compare their circumferences.
Can a circle have more than one inscribed angle for the same intercepted arc? Explain.

Word Problems:

A circular garden has a diameter of 20 meters. Calculate its area.
The circumference of a circular pond is 44 meters. Find its radius.
A wheel has a radius of 15 cm. How far does it travel in one complete revolution?
An arc in a circle measures 120 degrees. If the radius is 6 cm, find the length of the arc.

Theorems and Proofs:

State and prove the theorem that the perpendicular drawn from the center of a circle to a chord bisects the chord.
Prove that opposite angles of a cyclic quadrilateral are supplementary.

Multiple-Choice Questions:

What is the formula for the circumference of a circle? a) C = πr b) C = 2πr c) C = πr² d) C = 2r
If the radius of a circle is 9 cm, what is its diameter? a) 9 cm b) 18 cm c) 27 cm d) 81 cm
Which of the following is the formula for the area of a circle? a) A = πr b) A = 2πr c) A = πr² d) A = 2r
If an arc in a circle measures 90 degrees, what is the measure of its central angle? a) 45 degrees b) 90 degrees c) 180 degrees d) 360 degrees

True/False Statements:

The diameter of a circle is always twice its radius. (True/False)
A circle can have more than one tangent at a given point. (True/False)
The sum of angles in a cyclic quadrilateral is always 360 degrees. (True/False)
The area of a circle is equal to half the product of its radius and circumference. (True/False)

Diagram-Based Questions:

Draw a circle and label its center, radius, and a chord.
Illustrate an inscribed angle in a circle and label its components.
Draw a circle with a tangent and indicate the points of contact.
Create a diagram representing a cyclic quadrilateral and label its angles.

Application of Formulas:

If the circumference of a circle is 44 cm, find its radius.
A circle has a diameter of 18 cm. Calculate its area.
Given the area of a circle is 154 cm², find its radius.
If the length of an arc is 30 cm and the radius is 8 cm, find the central angle.
A circle has a circumference of 66 cm. What is its diameter?

Geometry Constructions:

Construct a circle with a given radius of 4 cm.
Using a compass, construct the circumcircle of a triangle ABC.
Draw an inscribed angle of 75 degrees in a circle.
Construct a tangent to a circle from an external point.

Algebraic Manipulations:

Express the circumference of a circle in terms of its radius using a variable.
If the circumference of a circle is C, express its diameter in terms of C.
Solve for the radius of a circle if its circumference is given as 36 cm.
If the area of a circle is A, express its radius in terms of A.

Critical Thinking:

Can a circle have an inscribed angle greater than 180 degrees? Justify your answer.
Discuss why the area of a circle is given by the formula A = πr².
Investigate and explain how the circumference of a circle is related to its diameter.
Analyze the significance of the inscribed angle theorem in real-world scenarios.

Exploration of Circle Properties:

Investigate the relationship between the radius, diameter, and circumference of a circle.
Explore scenarios in which the area of a circle is maximized or minimized.
Research and explain how circles are used in the design of gears.

Challenges and Extensions:

Given a circle with radius r, find the formula for the area of a sector with central angle θ.
Prove that the ratio of the circumference to the diameter of any circle is constant.

In-depth Theorems:

Prove that the angle subtended by an arc at the center of a circle is twice the angle subtended by it at any point on the remaining part of the circle.
Prove that opposite sides of a cyclic quadrilateral are supplementary.

Advanced Problem Solving:

In a circle with radius 10 cm, an arc AB subtends an angle of 45 degrees at the center. Calculate the length of AB.
A circle with radius 7 cm has an inscribed angle of 120 degrees. Find the length of the arc it intercepts.
Prove that the sum of the angles in a cyclic quadrilateral is 360 degrees.

Applications in Trigonometry:

If an arc in a circle with a radius of 12 cm measures 60 degrees, find the length of the arc.
Given a circle with a radius of 15 cm, find the angle subtended by an arc of length 9 cm.
A circle has a radius of 9 cm. Find the area of the sector formed by a central angle of 45 degrees.

Reflection and Review:

Reflect on the significance of the radius and diameter in the context of circles.
Review the different types of angles formed in and around a circle.

Evaluation and Assessment:

Design a problem that involves using the properties of circles to solve a real-world scenario.
Evaluate the statement: “The area of a circle is more important than its circumference in practical applications.” Justify your response.

Integration with Other Concepts:

Discuss how the concept of circles is related to the Pythagorean theorem.
Explore the connections between circles and the properties of triangles.

Conclusion and Recap:

Summarize the key properties and formulas related to circles covered in this chapter.
Reflect on how the understanding of circles contributes to a broader understanding of geometry.

Self-Assessment:

Assess your understanding of the chapter by explaining the steps involved in constructing a circumcircle.
Reflect on a challenging concept from the chapter and describe how you plan to address it for better understanding.

Feel free to adjust the difficulty level of the questions based on your students’ proficiency and the emphasis placed on specific topics in your curriculum.

CHAPTER–10 HERON’S FORMULARead More➔🠔Read Less

Multiple Choice Questions (MCQs):

The formula used to find the area of a triangle when all sides are known is: a) Pythagorean Theorem b) Area = (1/2) * base * height c) Heron’s Formula d) Area = s^2 (where s is the semi-perimeter)
If a triangle has sides of length 9 cm, 12 cm, and 15 cm, what type of triangle is it? a) Acute-angled b) Right-angled c) Obtuse-angled d) Equilateral
In Heron’s Formula, ‘s’ represents: a) Side length b) Semi-perimeter c) Area d) None of the above
What is the first step in applying Heron’s Formula to find the area of a triangle? a) Find the semi-perimeter b) Square each side length c) Add all side lengths d) Find the perimeter
The area of an equilateral triangle with side length ‘a’ using Heron’s Formula is: a) (a^2 * √3) / 4 b) (a^2 * √3) / 2 c) (a^2 * √3) / 3 d) (a^2 * √3) / 6

Fill in the Blanks:

Heron’s Formula is used to find the ________ of a triangle.
The semi-perimeter of a triangle is calculated by ________.
If a triangle is right-angled, one of the angles is ________.
The sides of an equilateral triangle are ________.
Heron’s Formula is named after the ancient Greek mathematician ________.

True/False Questions:

Heron’s Formula is only applicable to right-angled triangles. (True/False)
The order of side lengths in Heron’s Formula does not matter. (True/False)
An isosceles triangle cannot have its sides calculated using Heron’s Formula. (True/False)
The area of a triangle can be negative when using Heron’s Formula. (True/False)
The perimeter of a triangle is not required to calculate its area using Heron’s Formula. (True/False)

Short Answer Questions:

Explain the significance of Heron’s Formula in finding the area of a triangle.
If the sides of a triangle are 6 cm, 8 cm, and 10 cm, calculate the area using Heron’s Formula.
Under what conditions can Heron’s Formula be used to find the area of a triangle?
How is the semi-perimeter related to Heron’s Formula?
Can Heron’s Formula be used for any type of triangle? Explain.

Application-Based Questions:

A triangular garden has sides of length 13 m, 14 m, and 15 m. Calculate the cost of planting grass in the garden if the rate is ₹25 per square meter.
A triangle has sides of length 10 cm, 15 cm, and 18 cm. Determine the type of triangle and find its area using Heron’s Formula.
The sides of a triangle are in the ratio 3:4:5, and its perimeter is 72 cm. Find the area of the triangle using Heron’s Formula.
A triangular prism has a triangular base with side lengths 6 cm, 8 cm, and 10 cm. Find the total surface area of the prism using Heron’s Formula for the base.
An isosceles triangle has a base of length 12 cm, and the equal sides are each 15 cm. Calculate the area of the triangle using Heron’s Formula.
Matching Questions:
1. Match the following:
A. Pythagorean Theorem 1. Used to find the area of triangles B. Area = (1/2) * base * height 2. Used for right-angled triangles C. Heron’s Formula 3. Formula for the area of parallelograms D. Area = base * height 4. Formula for the area of triangles with known sides
Assertion-Reasoning Questions:
1. Assertion: Heron’s Formula is more complex than other methods for finding the area of a triangle. Reasoning: Heron’s Formula is based on the semi-perimeter, making it applicable to various types of triangles.
2. Assertion: The order of the side lengths in Heron’s Formula doesn’t matter. Reasoning: Heron’s Formula involves squaring the side lengths, so their order is crucial for correct calculations.
Diagram-Based Questions:
1. Given a triangle ABC with sides 8 cm, 15 cm, and 17 cm, draw the triangle and label its sides. Calculate the area using Heron’s Formula.
2. Provide a diagram of an acute-angled triangle. Using Heron’s Formula, find its area if the side lengths are 9 cm, 12 cm, and 15 cm.
Word Problems:
1. A triangular field has sides of length 24 m, 18 m, and 30 m. Calculate the area of the field using Heron’s Formula.
2. The sides of a triangular garden are in the ratio 5:12:13, and the perimeter is 150 m. Find the area of the garden using Heron’s Formula.
Comparative Questions:
1. Compare the advantages and disadvantages of using Heron’s Formula compared to the area = (1/2) * base * height formula.
2. Contrast Heron’s Formula with the Pythagorean Theorem in terms of their applications in finding areas of triangles.
Extension Questions:
1. Research and write a short paragraph on other historical mathematicians who contributed to the field of geometry.
2. How does the concept of Heron’s Formula extend to finding the volume of three-dimensional shapes?
Remember to adjust the difficulty level and format of questions based on the specific needs of the class and the examination format

CHAPTER–11 SURFACE AREAS AND VOLUMESRead More➔🠔Read Less

Multiple Choice Questions (MCQs):

The lateral surface area of a cylinder is: a) $2 π r$ b) $π r^{2}$ c) $2 π r h$ d) $π r h$
The volume of a cube with side length 3 cm is: a) 9 cm³ b) 18 cm³ c) 27 cm³ d) 36 cm³
If the radius of a sphere is doubled, how does its volume change? a) Becomes half b) Doubles c) Becomes four times d) Remains the same
The total surface area of a cone is given by the formula: a) $π r^{2}$ b) $2 π r$ c) $π r^{2} + π l$ d) $π r (r + l)$
The curved surface area of a cylinder is: a) $2 π r^{2}$ b) $π r^{2}$ c) $2 π r h$ d) $π r h$

Short Answer Questions:

Explain the concept of surface area and volume.
If a cube has a surface area of 54 cm², what is the length of its edges?
Calculate the volume of a cylinder with a radius of 5 cm and a height of 8 cm.
A cuboid has dimensions 4 cm, 6 cm, and 8 cm. Calculate its total surface area.
How is the volume of a cone different from the volume of a cylinder?

Fill in the Blanks:

The formula for the volume of a sphere is $3 4 π r^{3}$ .
The surface area of a cube with side length $s$ is $6 s^{2}$ .
The formula for the lateral surface area of a cylinder is $2 π r h$ .
The volume of a cone is $3 1 π r^{2} h$ .
The radius of a sphere is half of its _______.

True/False:

The volume of a rectangular prism is given by the formula $lw h$ .
The total surface area of a cylinder includes the area of its two bases.
If the radius of a cylinder is doubled, its volume becomes four times larger.
The sum of the areas of all the surfaces of a cube is $6 s^{2}$ .
The volume of a cone is always one-third of the volume of a cylinder with the same base and height.

Application-Based Questions:

A cylindrical tank has a radius of 2 m and a height of 6 m. Calculate the volume of water it can hold.
A cubical box has a surface area of 96 cm². Find the length of its edges.
The slant height of a cone is 10 cm, and the radius is 8 cm. Calculate the volume of the cone.
A cylindrical container has a diameter of 14 cm and a height of 21 cm. Determine its volume.
If the volume of a cube is 64 cm³, what is the length of its edges?

Matching:

Match the 3D shape with its formula for volume:
- Sphere A. $3 4 π r^{3}$
- Cube B. $π r^{2} h$
- Cone C. $s^{3}$
- Cylinder D. $lw h$

Long Answer/Problem Solving:

A cylindrical tank with a radius of 5 m is filled with water to a height of 8 m. Calculate the volume of water in the tank.
A cone has a slant height of 12 cm and a radius of 9 cm. Find its curved surface area.
The diameter of a hemisphere is 10 cm. Find its volume and total surface area.
A rectangular prism has dimensions 5 cm, 6 cm, and 8 cm. Determine its volume and surface area.
Multiple Choice Questions (MCQs):
The total surface area of a cube is $54 cm^{2}$ . What is the length of its edges? a) 3 cm b) 6 cm c) 9 cm d) 12 cm
The volume of a cylinder is $100 cm^{3}$ , and its height is 5 cm. What is the radius of the cylinder? a) 2 cm b) 4 cm c) 5 cm d) 10 cm
The ratio of the surface areas of two cubes is 4:9. If the side of the smaller cube is 3 cm, what is the side of the larger cube? a) 6 cm b) 9 cm c) 12 cm d) 15 cm
The radius of a sphere is 7 cm. What is the ratio of its surface area to the surface area of a sphere with a radius of 14 cm? a) 1:2 b) 1:4 c) 1:8 d) 1:16
The volume of a cone is $125 cm^{3}$ , and its height is 5 cm. What is the radius of the cone? a) 2 cm b) 3 cm c) 4 cm d) 5 cm
Short Answer Questions:
Explain the concept of a slant height in a cone.
A cylindrical vessel has a diameter of 14 cm and a height of 10 cm. Calculate its volume.
If the radius of a sphere is tripled, how does its volume change?
A rectangular box has dimensions 7 cm, 4 cm, and 6 cm. Determine its volume.
What is the difference between the total surface area and the lateral surface area of a cylinder?
Fill in the Blanks:
The formula for the lateral surface area of a cone is $π r l$ , where $l$ is the _______.
The volume of a cylinder is $π r^{2} h$ , where $r$ is the radius and $h$ is the _______.
The formula for the volume of a cube is $s^{3}$ , where $s$ is the _______.
The total surface area of a cylinder is $2 π r (r + h)$ , where $r$ is the radius and $h$ is the _______.
The surface area of a sphere is $4 π r^{2}$ , where $r$ is the _______.
True/False:
The volume of a cone is always smaller than the volume of a cylinder with the same base and height.
The total surface area of a rectangular prism is the sum of the areas of its six faces.
The radius of a cylinder is half of its diameter.
The volume of a cone is one-third of the volume of a sphere with the same radius.
The surface area of a sphere is $2 π r^{2}$ .
Application-Based Questions:
A cylindrical tube with a radius of 4 cm and a height of 15 cm is used to store rice. Calculate the volume of rice it can hold.
A cone-shaped ice cream cone has a radius of 3 cm and a slant height of 5 cm. Calculate its total surface area.
A rectangular tank with dimensions 10 m, 6 m, and 4 m is filled with water. Determine its volume.
A hemisphere is placed on a table. If its curved surface area is $66 cm^{2}$ , find its radius.
A cylindrical pillar has a diameter of 2 m and a height of 8 m. Calculate the cost of painting its curved surface at the rate of Rs. 20 per square meter.
Matching:
Match the 3D shape with its volume formula:
Cylinder A. $3 1 π r^{2} h$
Sphere B. $π r^{2} h$
Cone C. $3 4 π r^{3}$
Cuboid D. $π r^{2}$
Long Answer/Problem Solving:
A rectangular box has dimensions 5 cm, 8 cm, and 12 cm. If it is melted to form a cube, calculate the side length of the cube.
The volume of a cylinder is 3850 cm³. If its height is 10 cm, find the radius of the cylinder.
A conical tent has a diameter of 14 m and a slant height of 10 m. Determine its volume and the area of canvas required to make the tent.
A cylindrical tank is filled with water up to a height of 12 m. If the diameter of the base is 8 m, calculate the volume of water in the tank.
Feel free to adapt these questions based on the specific focus and emphasis of your lesson

CHAPTER–12 STATISTICSRead More➔🠔Read Less

Multiple Choice Questions (MCQs):

What is the mode of the following dataset: 12, 15, 18, 21, 25, 12, 21, 18, 15, 12, 25, 21, 12? a) 15 b) 18 c) 21 d) 12
Which measure of central tendency is influenced by outliers? a) Mean b) Median c) Mode d) Range
If the mean of a dataset is 20 and there are 5 data points, what is the sum of the data points? a) 100 b) 50 c) 25 d) 10
In a set of data, if the range is 15 and the highest value is 40, what is the lowest value? a) 25 b) 15 c) 20 d) 30
What is the median of the dataset: 14, 17, 12, 19, 15, 20, 16? a) 15 b) 16 c) 17 d) 18

Short Answer Questions:

Calculate the mean of the following dataset: 25, 30, 35, 40, 45.
Define the term “range” in statistics.
If the mode of a dataset is 12, can there be another mode?
Explain the importance of the median in skewed datasets.
If a dataset has an even number of values, how is the median calculated?

Long Answer Questions:

Given the dataset: 10, 12, 14, 16, 18, find the mean, median, and mode.
Describe a real-world situation where mode is a more appropriate measure of central tendency than the mean.
Explain the process of creating a histogram and its significance in data representation.
Discuss the limitations of using the mean as a measure of central tendency.
Create a dataset of 10 values and analyze it, presenting your findings using appropriate graphical representations.

Application-Based Questions:

You have data on the monthly temperatures of a city for a year. How would you use measures of central tendency to describe the climate?
A class of students took a math test, and the scores are recorded. Design a bar graph to represent the data.
Analyze the heights of students in your class and suggest the most appropriate measure of central tendency for this data.
A factory produces items, and the weights of the items are recorded. Calculate the mean and median, and discuss their implications.
Design a survey to collect data on the favorite subjects of students in your school. How would you represent this data graphically?

Higher-Order Thinking Questions:

Compare and contrast the mean and median as measures of central tendency.
In what situations would the mode be an inappropriate measure of central tendency?
Discuss the concept of “normal distribution” and its relevance in statistical analysis.
Imagine a dataset with two modes. What could be the possible implications of this?
How does the choice of measure of central tendency affect the interpretation of data in different contexts?
Descriptive Statistics:
1. Calculate the mode of the following dataset: 7, 9, 12, 7, 14, 9, 12, 14.
2. Explain the concept of interquartile range (IQR) and its significance in analyzing datasets.
3. Given a set of data with outliers, describe how the mean and median might be affected.
4. If the mean of a dataset is equal to the median, what can you infer about the data’s distribution?
5. Create a dataset with a mean of 25 and a median of 22.
Probability and Statistics:
1. A bag contains 5 red, 3 blue, and 2 green balls. What is the probability of drawing a blue ball?
2. In a deck of 52 cards, what is the probability of drawing a face card (jack, queen, or king)?
3. If the probability of an event happening is $5 3$ , what is the probability of the event not happening?
4. Explain the difference between experimental probability and theoretical probability.
5. A coin is flipped 3 times. Calculate the probability of getting exactly 2 heads.
Constructing and Interpreting Graphs:
1. Given a dataset of monthly rainfall, create a line graph to represent the variation over a year.
2. Design a bar graph to illustrate the number of students participating in different extracurricular activities in your school.
3. Explain the steps to create a pie chart and provide an example where a pie chart would be an effective representation.
4. Compare and contrast histograms and bar graphs. When is one more appropriate than the other?
5. Create a scatter plot using a set of data representing the relationship between study hours and test scores.
Analyzing Distributions:
1. Define a positively skewed distribution. Provide an example.
2. How does the shape of a normal distribution curve change when the standard deviation increases?
3. Describe a bimodal distribution and provide a real-world example.
4. In a dataset, the mean is 50, and the standard deviation is 10. Explain what this information tells you about the distribution.
5. If the range of a dataset is large, what does it suggest about the variability of the data?
Data Interpretation:
1. Analyze the following data: 22, 19, 25, 18, 22, 26, 15. What insights can you draw from the values?
2. A survey on favorite colors was conducted. Interpret the results of the survey and suggest reasons for any patterns observed.
3. Explain the concept of a box-and-whisker plot. How does it represent the spread of data?
4. Given the heights of students, discuss whether the distribution is likely to be normal or skewed.
5. Interpret the correlation coefficient in the context of two variables in a dataset.
Practical Applications:
1. A company produces smartphones, and the weights of the phones are recorded. How might statistical measures be useful in quality control?
2. Describe how statistical analysis can be applied in analyzing trends in the stock market.
3. Analyze the heights of plants in a garden over a month. How could statistical measures be applied to interpret plant growth?
4. In a traffic study, the speeds of cars on a highway are recorded. How might measures of central tendency be used in traffic management?
5. Discuss how statistical analysis can aid in making predictions about future trends in climate change.
Review and Reflection:
1. Summarize the key differences between mean, median, and mode.
2. Reflect on a situation where outliers could significantly impact the interpretation of data.
3. Describe a scenario where the mean and median convey different information about a dataset.
4. How does the concept of probability relate to real-life decision-making?
5. Discuss the ethical considerations when using statistics to make decisions or draw conclusions.
Feel free to adapt these questions as needed to fit your specific classroom requirements.