Jordan polygon

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 well-defined interior and exterior. Simple polygons are topologically equivalent to a disk. The breaking up of self-intersecting polygons into simple polygons (illustrated above) is also called polygon tessellation .

polygon | polygon tessellation | regular polygon | simple polyhedron | two-ears theorem