Any regular polygon of n sides, has an order of symmetry of n. Therefore, since a nonagon has nine sides, a nonagon has an order of symmetry of 9.
It may, or it may not, be symmetrical. There are different types of nonagons.
nonagon
Because nonagon means 9 sides
Not a regular nonagon.
A nonagon has nine sides.
A nonagon
"nonagon" is not a prefix.
Nonagon.
a nonagon
A nonagon.
A nonagon is a 2D shape so you cannot make a 3D nonagon!
Only if all nine sides are the same length.