Class 8 Maths – Chapter 10

Visualising Solid Shapes

STEP 5: Worksheet – FULL ANSWERS (Step-by-Step)

Section A: Very Short Answer – Solutions

1. How many dimensions does a solid object have?
A solid object has three dimensions: length, breadth and height.

2. Name any two three-dimensional shapes.
Cube and cuboid are examples of three-dimensional shapes.

3. What do we call the flat surface of a solid?
The flat surface of a solid is called a face.

4. Write the number of vertices in a cube.
A cube has 8 vertices.

5. What is the top view of an object?
The top view is the shape seen when an object is viewed from the top.

Section B: Short Answer – Solutions

6. Define a vertex with an example.
A vertex is a point where two or more edges meet. Example: A cube has 8 vertices.

7. What is a net? Why is it useful?
A net is a flat shape that can be folded to make a solid. It helps us understand the structure of three-dimensional objects.

8. Write the number of faces, edges and vertices of a cuboid.
Faces = 6, Edges = 12, Vertices = 8.

9. Differentiate between 2D shapes and 3D shapes.
2D shapes have length and breadth only. 3D shapes have length, breadth and height.

10. What happens when an object is rotated?
When an object is rotated, its position changes but its shape remains the same.

Section C: Long Answer – Solutions

11. Explain the different views of a solid object.
The different views of a solid object are:

• Top view
• Front view
• Side view

These views help us understand the shape and size of the object clearly.

12. Draw and explain the net of a cube.
A cube has 6 square faces. The net of a cube consists of 6 squares joined together in a pattern that can be folded to form a cube.

13. Describe faces, edges and vertices using a cube.
A cube has:

• 6 faces
• 12 edges
• 8 vertices

Each face is a square.

14. Explain how rotation changes the orientation of an object.
Rotation changes the direction in which an object faces, but the size and shape of the object remain unchanged.

15. Why is visualising solid shapes important in real life?
Visualising solid shapes helps in architecture, engineering, packaging, design and understanding objects around us.

📝 Exam Tip

Always draw neat diagrams for solid shapes