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°.
A pentago… See more

An equilateral pentagon is a polygon with five sides of equal length. However, its five internal angles can take a range of sets of values, thus permitting it to form a family of pentagons. In contrast, the regular pentagon i… See more