It is a nonagon
enneagon or nonagon
Because they have 9 sides
A polygon with 9 sides and 9 vertices is a nonagon
There is no formula for how many sides there are in a polygon; the name of the polygon shows how many sides it has.
A nonagon
A nonagon.
a nonagon
It is 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