In this activity, we will learn to identify shapes that have been reflected in a mirror line.
When we reflect a shape, it appears flipped, like a mirror image.
The mirror line is often marked using a dotted or dashed line.
Look at the following L-shapes drawn on 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.
Shape A and Shape B are reflections of each other in this vertical mirror line.
Let's try an example together.
Is the mirror line used to reflect shape A to shape B, vertical or horizontal?
In the following example, the mirror line is horizontal.
The same technique is used to reflect the shape.
Now it's time for you to have a go at some questions.