| Regular heptadecagon | |
|---|---|
 A regular heptadecagon | |
| Type | Regular polygon |
| Edges and vertices | 17 |
| Schläfli symbol | {17} |
| Coxeter–Dynkin diagrams |    |
| Symmetry group | Dihedral (D17), order 2×17 |
| Internal angle (degrees) | ≈158.82° |
| Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
| Dual polygon | Self |
In geometry, a heptadecagon, septadecagon or 17-gon is a seventeen-sided polygon.