Hendecagon
| Regular hendecagon | |
|---|---|
A regular hendecagon | |
| Type | Regular polygon |
| Edges and vertices | 11 |
| Schläfli symbol | {11} |
| Coxeter–Dynkin diagrams | |
| Symmetry group | Dihedral (D11), order 2×11 |
| Internal angle (degrees) | ≈147.273° |
| Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
| Dual polygon | Self |
In geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon. (The name hendecagon, from Greek hendeka "eleven" and –gon "corner", is often preferred to the hybrid undecagon, whose first part is formed from Latin undecim "eleven".)