In geometry, a pentadecagon (or pentakaidecagon) is any 15-sided, 15-angled, polygon. ==Regular pentadecagon== == Uses == A regular triangle, decagon, and pentadecagon can completely fill a plane vertex. ===Construction=== A regular pentadecagon is constructible using compass and straightedge: Construction of a regular pentadecagon Construction of...
A pentadecagon is a fifteen-sided polygon.
A 15 sided polygon. See also: Polygon.