Pentakaidecagonal

Pentakaidecagonal refers to a shape or object that has fifteen sides. The term is derived from Greek roots: "penta" meaning five, "kaideka" meaning fourteen, and "gonia" meaning angle. Therefore, a pentakaidecagon is a polygon with fifteen edges and fifteen vertices.

In geometry, a pentakaidecagon can be regular or irregular. A regular pentakaidecagon has all sides equal in length and all interior angles equal in measure. The measure of each interior angle in a regular pentakaidecagon is 156 degrees. The sum of the interior angles of any pentakaidecagon, regular or irregular, is 2340 degrees.

The term pentakaidecagonal might also be used to describe something with a fifteen-sided structure or arrangement. For instance, a pentakaidecagonal prism would be a prism with pentakaidecagonal bases. In other contexts, it could describe a pattern or a collection that is organized into fifteen parts or faces. The concept is less common in everyday language compared to polygons with fewer sides, such as triangles or squares.