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Learn how to find lines of symmetry on shapes and practise drawing them.


Symmetry is when one side of a shape is a mirror image of the other side.

Lots of buildings and everyday objects use symmetry because it looks appealing to the human eye.


A 2D shape is symmetrical if a line can be drawn through it and either side is a reflection of the other. You would call this the line of symmetry.

If you put a mirror on this line, you would see the whole shape in the reflection. That’s why a line of symmetry is sometimes called the mirror line.

Sometimes, you can fold a shape in half, if it fits into itself perfectly with no overlaps, then you have found a line of symmetry. Some shapes have more than one line of symmetry.