Definition:Triskaidecagon
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Definition
A triskaidecagon is a polygon with exactly $13$ sides.
Regular Triskaidecagon
A regular triskaidecagon is a triskaidecagon which is both equilateral and equiangular.
That is, a regular polygon with $13$ sides.
That is, a triskaidecagon in which all the sides are the same length, and all the vertices have the same angle:
Linguistic Note
The word triskaidecagon derives from the Greek triskaideka, meaning thirteen, and gon, deriving from the Greek for corner.
Sources
- 1971: George E. Andrews: Number Theory ... (previous) ... (next): $\text {3-3}$ Wilson's Theorem: Theorem $\text {3-5}$