From ProofWiki
Jump to navigation Jump to search


A hendecagon is a polygon with exactly $11$ sides.


Regular Hendecagon

A regular hendecagon is a hendecagon which is both equilateral and equiangular.

That is, a regular polygon with $11$ sides.

That is, a hendecagon in which all the sides are the same length, and all the vertices have the same angle:


Also known as

A hendecagon can also be referred to as an undecagon.

Some sources give it as endecagon.

Linguistic Note

The word hendecagon derives from the Greek hendeka, meaning eleven, and gon, deriving from the Greek for corner.

The word undecagon is a hybrid word whose first part derives from the Latin undecim, meaning eleven.

The word endecagon may be erroneous.