It refers to a balance or correspondence in the arrangement of parts of a whole. Here are some examples:
* In geometry: A shape has symmetry if it can be divided into two or more identical parts.
* In nature: Butterflies, snowflakes, and human faces often exhibit bilateral symmetry, meaning they are mirrored on both sides.
* In art: Artists use symmetry to create balance and harmony in their compositions.
If you're interested in learning more about symmetry, you can explore:
* Books: "Symmetry" by Hermann Weyl
* Websites: The Geometry Center's Symmetry page
* Videos: Khan Academy's videos on symmetry
Please let me know if you have any other questions about symmetry.