Global InformationIcositrigon information
| Regular icositrigon | |
|---|---|
 A regular icositrigon | |
| Type | Regular polygon |
| Edges and vertices | 23 |
| Schläfli symbol | {23} |
| Coxeter–Dynkin diagrams |     |
| Symmetry group | Dihedral (D23), order 2×23 |
| Internal angle (degrees) | ≈164.348° |
| Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
| Dual polygon | Self |
In geometry, an icositrigon (or icosikaitrigon) or 23-gon is a 23-sided polygon. The icositrigon has the distinction of being the smallest regular polygon that is not neusis constructible.