A regular pentadecagon
|Edges and vertices||15|
|Symmetry group||Dihedral (D15), order 2×15|
|Internal angle (degrees)||156°|
|Properties||Convex, cyclic, equilateral, isogonal, isotoxal|
All sides of a regular pentadecagon are the same length. Each corner is 156°. All corners added together equal 2340°.
The amount of space a regular pentadecagon takes up is
a is the length of one of its sides.
A regular triangle, decagon, and pentadecagon can completely fill a plane vertex.