# Reflection Symmetry

## Reflection Symmetry

**Reflection Symmetry** (sometimes called *Line Symmetry* or** ***Mirror Symmetry*) is easy to see, because one half is the reflection of the other half.

Here my dog "Flame" has her face made perfectly The white line down the center is the |

The reflection in this lake also has symmetry, but in this case:

- the
**Line of Symmetry**runs left-to-right - it is not perfect symmetry, because the image is changed a little by the lake surface.

## Line of Symmetry

The Line of Symmetry (also called the **Mirror Line**) can be in **any direction**.

But there are four common directions, and they are named for the line they make on the standard XY graph.

See these examples (the artwork was made using Symmetry Artist) :

Line of Symmetry | Sample Artwork | Example Shape |

## Plane Shapes

Not all shapes have lines of symmetry, or they may have several lines of symmetry. For example, a Triangle can have **3**, or **1** or **no** lines of symmetry:

Equilateral Triangle(all sides equal, all angles equal) | Isosceles Triangle(two sides equal, two angles equal) | Scalene Triangle(no sides equal, no angles equal) | ||

3 Lines of Symmetry | 1 Line of Symmetry | No Lines of Symmetry |

I have collected some more examples at Lines of Symmetry of Plane Shapes.