Back خمس عشري الأضلاع Arabic Pentadecágonu AST Петнадесетоъгълник Bulgarian Pentadecàgon Catalan پازدەلا CKB Patnáctiúhelník Czech Pentadekagon Danish Fünfzehneck German Δεκαπεντάγωνο Greek Pentadecàgon EML
| Regular pentadecagon | |
|---|---|
 A regular pentadecagon | |
| Type | Regular polygon |
| Edges and vertices | 15 |
| Schläfli symbol | {15} |
| Coxeter diagram |    |
| Symmetry group | Dihedral (D15), order 2×15 |
| Internal angle (degrees) | 156° |
| Dual polygon | Self |
| Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
A pentadecagon or quindecagon or 15-gon is a shape with 15 sides and 15 corners.