Pentadecagon

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Regular pentadecagon
Pentadecagon.svg
A regular pentadecagon
Type Regular polygon
Edges and vertices 15
Schläfli symbol {15}
Coxeter diagram CDel node 1.pngCDel 15.pngCDel node.png
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.

Regular pentadecagon[change | change source]

All sides of a regular pentadecagon are the same length. Each corner is 147.27°. All corners added together equal 156°.

Area[change | change source]

The amount of space a regular pentadecagon takes up is

a is the length of one of its sides.

Uses[change | change source]

3.10.15 vertex.png
A regular triangle, decagon, and pentadecagon can completely fill a plane vertex.