Regular polygon

equiangular and equilateral polygon

A regular polygon is a polygon which is both equilateral (which means all its sides have the same length) and equiangular (which means that all its angles are the same).

Regular heptadecagon
A regular heptadecagon
TypeRegular polygon
Edges and vertices17
Schläfli symbol{17}
Coxeter diagramCDel node 1.pngCDel 17.pngCDel node.png
Symmetry groupDihedral (D17), order 2×17
Internal angle (degrees)≈158.82°
Dual polygonSelf
PropertiesConvex, cyclic, equilateral, isogonal, isotoxal


The simplest examples of regular polygons are: