Pentagon

In geometry, a pentagon (from Greek: πέντε (pente), "five", and γωνία (gonia), "angle") is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°.

This article is about the geometric figure. For the headquarters of the United States Department of Defense, see The Pentagon. For other uses, see Pentagon (disambiguation).
Pentagon
A cyclic pentagon
Edges and vertices5

A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram.

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