Definition:Nonagon/Regular

Definition
A regular nonagon is a nonagon which is both equilateral and equiangular.

That is, a regular polygon with $9$ sides.

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


 * RegularNonagon.png

Also known as
A regular nonagon can also be referred to as a regular enneagon.