In this activity, we'll take a look at right angles.

 

A right angle is an angle that is equal to 90°.  

 

Here is a right angle.

 

 

We can see it's marked with a rectangle corner marker.

If you see an angle marked with a square or rectangle, it's a right angle.

 

In the rectangle below, we have four right angles - one at each corner.

 

 

Let's look at an example question together.

 

Question

Is this angle larger or smaller than a right angle?

 

 

Answer

The angle above is marked with a curved angle marker and it is larger than the example of a right angle.

 

Think about the corners of the rectangle shown above the example.

The angle we are shown in the example is much larger than the rectangle's corner. 

 

So, the angle above is larger than a right angle.

 

Let's have a go at some questions now.