Lines of symmetry

I can identify shapes and images that have reflective symmetry and explain where the line of symmetry lies.

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Lines of symmetry

I can identify shapes and images that have reflective symmetry and explain where the line of symmetry lies.

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Key learning points

A line of symmetry is used to show that one half of a shape is a reflection of the other half.
When an image is folded along a line of symmetry, the two halves will match.

Keywords

Line of symmetry - If you were to fold a shape on its line of symmetry, both halves would match exactly.
Reflection - An image or shape as it would be seen in a mirror.
Symmetrical - When a shape has a line of symmetry, it can be described as symmetrical.

Common misconception

Children may think that any line drawn down the middle of a shape is a line of symmetry.

It is important for children to see that a line of symmetry can be folded to give two halves that match - one half is a reflection of the other half. Explore folding cut-outs of symmetrical and asymmetrical shapes to find lines of symmetry.

Look for examples of reflective symmetry in the children's environment and when learning about other subjects e.g. lines of symmetry in flags or famous landmarks. Use mirrors to explore lines of symmetry in different shapes and to support children when drawing reflections in a line of symmetry.

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Licence

This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).