There are 72 degrees in each exterior angle of a regular pentagon. Each internal angle is equal to 108 degrees, which means that the exterior angle size can be calculated by subtracting 108 from 180.
A pentagon refers to any polygon with five sides. It must have straight edges and form a closed loop. A regular pentagon is a specific type of pentagon where all sides and interior angles are the same size. Since the interior angles are all the same size, the exterior angles must also be the same size. A regular pentagon has five possible lines of symmetry.