We comprehend. As a result, the total of a pentagon's internal angles is 540 degrees. Regular Pentagons: Regular pentagons have all sides that are the same length (congruent) and all interior angles that are the same size (congruent). Because these properties hold for the entire figure, they can be said to define a regular pentagram. Thus, a regular pentagon is a polygon with five straight edges and five right angles between each pair of opposite sides. A regular pentagram is any figure composed of five copies of this pattern, whether or not they overlap. There are two ways to describe the positions of the points on a regular pentagram. They can be arranged in a circle with the center at the midpoint of one side, or they can be placed at the endpoints of five lines that all meet at a single point. In mathematics, these are called congruent polygons because they are identical to each other except for their orientation. A pentagon that is not regular has some sides that are longer than others. The only exception is when all the sides are equal in length, in which case it is called a scalene pentagon. A pentagram that is not regular has some sides that are shorter than others; there are three types: equilateral, isoceles, and right-angled. An equilateral pentagram has all its sides equal in length.