1.What are the properties of a cube. Give a real-life example of a cube?

A cube has 8 vertices, 6 surfaces and 12 edges.
All edges of a cube are equal.

Example: dice 

2. Define a cone. Give an example of an object which is conical in shape?

A cone has a flat surface, 1 curved surface, 1 curved edge and 1 vertex.


Example: party cap

3. What is a cylinder? Give a real-life example of a cylinder.

A cylinder has 2 flat surfaces, 1 curved surface and 1 curved edge.

Example: Pipes

4. What is a sphere? Give an example.

A sphere has 1 curved surface and 1 curved edge.

Example: Ball

5. Give the properties of a cuboid. Give an example.

A cuboid has 8 vertices, 6 surfaces, and 12 edges.
The opposite sides of a cuboid are equal.

6. What is a vertex?

The point at which two lines (or edges) meet is called a vertex.


In the given figure, A is the vertex.

7. What is the difference between cuboid and a cube?

In a cube, all edges are equal whereas in a cuboid, opposite sides are equal (all sides need not be equal).

9. Write cuboid, cube, cylinder, cone or sphere from the following figure.

i) Cylinder
ii) Spherical
iii) Cube
iv) Cone

10. What is the shape of a room?

Cuboid

11.Unscrambling the shape name in the context of the sentence.

Directions: Rewrite the given below statements by unscrambling the underlined words.
   
i) If we stretch a thread tightly, we get a trsathig line.

ii) A cterglaen has four straight lines.

iii) If we hold the thread loosely, we get a ucevdr line.

iv) A icrlce is made of curved line.

v) A circle has no sides or norcres.

vi) A ritangel has 3 sides and 3 corners.

vii) A qsraue is made of straight lines.

viii) A biocud has 6 faces, 12 edges and 8 corners.

ix) A ylcdiren has 2 faces, 2 edges and no corners.

x) A ocen has 2 faces, 1 edge and 1 corner.

i) If we stretch a thread tightly, we get a straight line.

ii) A rectangle has four straight lines.

iii) If we hold the thread loosely, we get a curved line.

iv) A circle is made of curved line.

v) A circle has no sides or corners.

vi) A triangle has 3 sides and 3 corners.

vii) A square is made of straight lines.

viii) A cuboid has 6 faces, 12 edges and 8 corners.

ix) A cylinder has 2 faces, 2 edges and no corners.

x) A cone has 2 faces, 1 edge and 1 corner.

12. Fill in the blanks.

a. A triangle has __________ vertices.

b. A cube has ________ faces and _________ corners.

c. A sphere has _________ faces.

d. Cone has __________ vertices.

a. Three

b. Six, eight

c. One

d. No vertices

13. Match the following

14. True or False

1. A circle is made of curved line.

2. A cone has 1 faces, one edge and one corner.

3. A cuboid has 8 faces, 12 edges and 8 corners.

4. If we hold the thread loosely, we get a curved line.

1. True

2. False

3. False

4. True