Lesson

Let's review the names of 2D shapes .

What is the name of the shape below?

A

Triangle

B

Rectangle

Worked Solution

Idea summary

To help work out the name of a shape, think about properties like:

How many sides it has

What sides are the same length

Let's look at how some familiar 2D shapes can be broken up into other shapes.

The shape below can be made up of which three shapes?

A

B

C

Worked Solution

Idea summary

If we start with a two dimensional (2D) shape, we can break it into other 2D shapes.

Let's go the other way and put shapes together to build other shapes. It's kind of like a puzzle.

The five shapes below can be combined to make which of the following composite shapes?

A

B

Worked Solution

Idea summary

We can join, or combine, shapes together to make new shapes.