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A concave polygon is a polygon that is not convex. A simple polygon is concave iff at least one of its internal angles is greater than 180 degrees. An example of a non-simple ...

Except for convex polygons, every simple polygon has at least one mouth.

A polygon P is said to be simple (or a Jordan polygon) if the only points of the plane belonging to two polygon edges of P are the polygon vertices of P. Such a polygon has a ...

The edge of a polygon or face of a polyhedron are sometimes called sides.

A simple polygon with precisely two ears and one mouth.

A random polygon containing the origin (Kovalenko 1999).

A polygon whose vertex angles are equal (Williams 1979, p. 32).

Except for triangles, every simple polygon has at least two nonoverlapping ears.

A random polygon is a polygon generated in some random way. Kendall conjectured that the shape of a random polygon is close to a disk as the area of the polygon becomes large ...

An equilateral polygon is a polygon whose edges are all of equal length (Williams 1979, pp. 31-32). The most prominent examples of equilateral polygons are the regular ...