A polygon is a two-dimensional shape. It is a shape that is made up of straight lines that are connected so there are no openings. If the polygon has angles that are equal to each other, it is considered regular. If the angles are not equal, it is irregular.
A convex polygon has no angles that point inwards. If there is an internal angle that is greater than 180 degrees, then the polygon is considered concave. The lines of a simple polygon do not cross onto each other while those of a complex polygon do.Learn more about Shapes