A regular pentagon has Schläfli symbol {5} and interior angles of 108°.
Moss pentagonPentagon (Wikipedia)
In geometry, a pentagon (from the Greek πέντε pente meaning five and γωνία gonia meaning angle) is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°.![Regular_polygon_5_annotated.svg (Wikimedia Commons)](https://upload.wikimedia.org/wikipedia/commons/0/01/Regular_polygon_5_annotated.svg)