## ::Reflection symmetry

### ::concepts

Symmetry::title Geometry::there Object::first Plane::respect Shape::figure Symmetry::function

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**Reflection symmetry**, **line symmetry**, **mirror symmetry**, **mirror-image symmetry**, or (in biology) **bilateral symmetry** is symmetry with respect to reflection. That is, a figure which does not change upon undergoing a reflection has reflectional symmetry.

In 2D there is a line of symmetry, in 3D a plane of symmetry. An object or figure which is indistinguishable from its transformed image is called mirror symmetric.

**Reflection symmetry sections**

Intro Symmetric geometrical shapes Mathematical equivalents Advanced types of reflection symmetry In nature In architecture See also References Bibliography External links

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