Polygon

Polygon (Gr. polys, 'many,' gōnia, 'corner'), a plane figure, bounded by a number of straight lines; the name is conventionally limited to those plane figures whose bounding straight lines are more than four in number. Polygons of 5, 6, 7, 8, &c. sides are denominated pentagons, hexagons, heptagons, octagons, &c.; and when the number of sides exceeds twelve the figure is merely mentioned as a polygon of so many sides.