A nonagon.
A nonagon
It is a nonagon
A nonagon
enneagon or nonagon
a polygon with 9 sides is called a nonagon
A nonagon is a polygon with 9 sides
Nonagon or Enneagon
assuming you mean polygon. a polygon with 9 sides is a nonagon
It is a nonagon which is a polygon with 9 sides
Providing that it is a regular polygon then it is a nonagon which has 9 sides
The name of a polygon with 15 sides is a pentadecagon