Topics
12. Solids
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Australia
Year 3

12.02 Pyramids

Lesson
Practice
Lesson

Are you ready?

Being able to identify the  key features of shapes  can help us in this lesson.

Examples

Example 1

How many vertices does this shape have?

An image of a rectangle.
Worked Solution
Create a strategy

Vertices are the corners where two edges meet.

Apply the idea

It has 4 vertices.

Idea summary

Vertices are the corners where two edges meet.

An edge is a straight line that makes part of the outside of a shape.

Pyramids

This video looks at pyramids, it starts with showing how a pyramid is made by looking at its net, and then looks at the faces, edges and vertices of a pyramid.

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Examples

Example 2

Here is a square pyramid:

A square pyramid.
a

How many faces does it have?

Worked Solution
Create a strategy

Faces are the flat sides of a solid object.

Apply the idea

It has 5 faces: the 4 triangles and the 1 square base.

b

How many vertices does it have?

Worked Solution
Create a strategy

Vertices are the corners where two edges meet.

Apply the idea

It has 5 vertices.

c

How many edges does it have?

Worked Solution
Create a strategy

An edge is where two faces meet.

Apply the idea

It has 8 edges.

Idea summary

Pyramids can have different bases, and the name of the base tells us the name of the pyramid.

Outcomes

AC9M3SP01

make, compare and classify objects, identifying key features and explaining why these features make them suited to their uses

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