Five-sided plane figure. A regular pentagon has all five sides of equal length and all five angles of equal size, 108°. It has golden section proportions between its sides and diagonals. The five-pointed star formed by drawing all the diagonals of a regular pentagon is called a pentagram. This star has further golden sections.
Angles in a polygon
A symmetrical five-pointed star polygon formed by drawing all the diagonals of a regular pentagon. See golden section . ...
n 1 a star-shaped figure formed by extending the sides of a regular pentagon to meet at five points 2 such a figure used as a magical or symbolic
A polygon is a shape with three or more straight sides. To calculate the angle sum of a polygon, split it into triangles. For the five-sided polygon