 # 9.01 Names and properties of shapes

Lesson

## Ideas

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?

Worked Solution
Create a strategy

Count the number of corners of the rectangle where two edges meet.

Apply the idea

Vertices = 4

Idea summary

Vertices are the corners where two edges meet.

## Shape names and properties

This video shows you how to classify shapes based on a number of key features including sides, angles, and vertices.

### Examples

#### Example 2

How many angles are there inside the following shapes?

a
Worked Solution
Create a strategy

Count how many of these spaces there are inside the triangle.

Apply the idea

There is an angle at each corner of the triangle. There are 3 corners.

There are 3 angles.

b
Worked Solution
Create a strategy

Count how many of these spaces there are inside the hexagon.

Apply the idea

There is an angle at each corner of the hexagon. There are 6 corners.

There are 6 angles.

Idea summary

To name a shape, look at its key features, including sides, angles, and vertices.

### Outcomes

#### MA2-15MG

manipulates, identifies and sketches two-dimensional shapes, including special quadrilaterals, and describes their features