Reflection symmetry

Figures with the axes of symmetry drawn in. The figure with no axes is asymmetric.

A normal distribution bell curve is an example symmetric function

Many animals, such as this spider crab Maja crispata, are bilaterally symmetric.

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.

单词	Line symmetry
释义	Line symmetry 英语百科 Reflection symmetry 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.
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Line symmetry

Reflection symmetry