Dodecagon
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In geometry, a dodecagon, or 12-gon, is any twelve-sided polygon.
The Vera Cruz church in Segovia
A 1942 British threepence, reverse
Wooden pattern blocks dodecagon
Regular polygon
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In Euclidean geometry, a regular polygon is a polygon that is direct equiangular and equilateral. Regular polygons may be either convex or star. In the limit, a sequence of regular polygons with an in
Dodecagon
…In geometry, a dodecagon, or 12-gon, is any twelve-sided polygon. A regular dodecagon is a figure with sides of the same length and internal angles of the same size. It has twelve lines of reflective symmetry and rotational…
Antiprism 17