Pentagon

Pentagon
A cyclic pentagon
Edges and vertices	5

In geometry, a pentagon (from Greek πέντε (pente) 'five' and γωνία (gonia) 'angle'^[1]) is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°.

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