# Definition:Hendecagon/Regular

## Definition

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 regular hendecagon can also be referred to as a regular undecagon.

Some sources give it as regular 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.