List of circle topics

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This list of circle topics includes things related to the geometric shape, either abstractly, as in idealizations studied by geometers, or concretely in physical space. It does not include metaphors like "inner circle" or "circular reasoning" in which the word does not refer literally to the geometric shape.

Geometry and other areas of mathematics[edit]

Physics[edit]

Geography[edit]

A great circle on a sphere

Artifacts[edit]

A driving wheel on a steam locomotive.

Glyphs and symbols[edit]

See also[edit]