Reflect Points on a Grid

Look at the following rectangle drawn on a set of  x and y-coordinate axes.

When we reflect a shape in a mirror line, we reflect each corner in turn.

This is done by moving each point directly to the mirror line and then the same distance beyond.

The result looks like this:

When writing the coordinates, don't forget to separate them with a comma and put brackets around them!

We also need to be careful to always write the x-coordinate first!

Are you ready to try some questions?