📘 Practice Set 1

Chapter 1 – Three-Dimensional Shapes

Section A – Fill in the Blanks

1. A polygon is a __________ figure with three or more sides.
2. A two-dimensional shape has only __________ surface.
3. A three-dimensional shape has length, width and __________.
4. The point where two sides meet is called a __________.
5. A cuboid has __________ rectangular faces.
6. A cylinder has __________ curved face.
7. A cone has __________ circular face.
8. A sphere has no edges and no __________.
9. The flat bottom surface of a cone is called a __________ face.
10. A prism always has __________ equal bases.

Section B – Choose the Correct Answer

1. Which of these is a two-dimensional shape?
   A) Cube    B) Cone    C) Rectangle    D) Sphere


2. Which shape has one curved face and one circular face?
   A) Cylinder    B) Cone    C) Cuboid    D) Sphere


3. Which shape has only curved surface?
   A) Cone    B) Sphere    C) Cylinder    D) Cuboid


4. The side faces of a prism are:
   A) Circular    B) Rectangular    C) Triangular    D) Curved


5. Which shape has only one base?
   A) Prism    B) Pyramid    C) Cylinder    D) Cube


6. Which object is shaped like a cuboid?
   A) Football    B) Book    C) Ice cream cone    D) Orange


7. The top point of a cone is called:
   A) Face    B) Edge    C) Vertex    D) Radius


8. How many circular edges does a cylinder have?
   A) 0    B) 1    C) 2    D) 3


9. Which shape has triangular side faces?
   A) Cuboid    B) Prism    C) Pyramid    D) Cylinder


10. A football is an example of:
    A) Cone    B) Sphere    C) Cube    D) Prism

Section C – True or False

1. Every polygon is a closed figure.
2. A sphere has one curved surface.
3. A cuboid has 8 vertices.
4. A cone has two curved faces.
5. A prism has two equal bases.
6. A pyramid has one top vertex.
7. A cylinder has no flat faces.
8. A square is a three-dimensional shape.
9. A sphere has edges.
10. A rectangle is a two-dimensional shape.

Section D – Match the Following

Section E – Name the Shape

1. Has 2 circular faces and 1 curved face. __________
2. Has only one curved surface and no edges. __________
3. Has 6 rectangular faces. __________
4. Has one circular face and one curved face. __________
5. Has triangular side faces meeting at one point. __________

Section F – Short Answer Questions

1. What is a polygon?
2. What is a vertex?
3. What is an edge?
4. What is a face?
5. What is a curved face?

Section G – Observe and Answer

Complete the table.

Section H – Give One Example

1. One object shaped like a cone.
2. One object shaped like a sphere.
3. One object shaped like a cylinder.
4. One object shaped like a cuboid.
5. One object shaped like a pyramid.

Section I – Think and Answer

1. Why is a football called a sphere?
2. Why is a cube called a three-dimensional shape?
3. Why does a pyramid have only one base?
4. Why can't a circle be called a three-dimensional shape?
5. What is the main difference between a prism and a pyramid?

Section J – Brain Booster ⭐

1. Ravi says that a cylinder has no flat face. Is he correct? Explain.
2. Which shape would you choose to make a birthday cap? Why?
3. Which solid shape is formed when many equal circles are stacked one above another?
4. Which solid shape is formed when many equal rectangles are stacked one above another?
5. Name any three three-dimensional shapes that you see every day.

✅ Solutions

Section A Answers

1. closed
2. one
3. height
4. vertex
5. 6
6. 1
7. 1
8. vertices
9. circular
10. two

Section B Answers

1. C) Rectangle
2. B) Cone
3. B) Sphere
4. B) Rectangular
5. B) Pyramid
6. B) Book
7. C) Vertex
8. C) 2
9. C) Pyramid
10. B) Sphere

Section C Answers

1. True
2. True
3. True
4. False
5. True
6. True
7. False
8. False
9. False
10. True

Section D Answers

1-c, 2-a, 3-b, 4-d, 5-e

Section E Answers

1. Cylinder
2. Sphere
3. Cuboid
4. Cone
5. Pyramid

Section F Answers

1. A polygon is a closed figure with three or more sides.
2. A vertex is a corner point where sides or edges meet.
3. An edge is the line where two faces meet.
4. A face is a flat surface of a three-dimensional shape.
5. A curved face is a round or bent surface of a three-dimensional shape.

Section G Answers

Note: For cone, cylinder and sphere, curved surfaces are counted as faces here because the chapter uses curved face / curved surface in its explanation.

Section H Answers

1. Ice cream cone / birthday cap
2. Football / ball / ladoo
3. Drum / bottle / dustbin
4. Book / matchbox / brick
5. Tent / pyramid-shaped roof

Section I Answers

1. A football is called a sphere because it is round from all sides.
2. A cube is three-dimensional because it has length, width and height.
3. A pyramid has only one base because its side faces meet at one top vertex.
4. A circle is not three-dimensional because it is flat and has no height.
5. A prism has two equal bases, while a pyramid has one base and one top vertex.

Section J Answers

1. No. A cylinder has two flat circular faces and one curved face.
2. A cone, because a birthday cap has a circular base and one pointed top.
3. Cylinder.
4. Cuboid or rectangular prism.
5. Examples: book, ball, bottle, box, drum, brick.