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Use the nets given at the back of the book to make the models of prisms and pyramids
shown below:

prisms pyramids

Triangular
Prism

Triangular
Pyramid
Pentagonal
Pyramid

Hexagonal Square
Square Prism Pyramid
Prism

example. Look at the shapes of prisms and pyramids and write your observations.

Solution. A prism is a solid shape that: A pyramid is a solid shape that:

• Has two flat ends called bases. • Has one flat base.
They are the same shape and • Has triangular lateral faces that

size. come to a point at the top (called
• Has rectangular lateral faces. the apex).

Exercise 7A

1. Ramu is playing with blocks. He has made a tower using his blocks as shown

alongside. Can you identify which kinds of shapes the tower has?

2. Ria has made a few models of solids using straws and clay.

i. ii. iii. iv. v.
Identify the shapes that have:

a. 5 flat faces b. 8 vertices c. less than 10 edges

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Geometry