A nonagon is a plane area enclosed by nine straight lines.
nonagon
Because nonagon means 9 sides
Not a regular nonagon.
A nonagon has nine sides.
Nonagon.
"nonagon" is not a prefix.
A nonagon
A nonagon.
a nonagon
It is a nonagon
A nonagon is a 2D shape so you cannot make a 3D nonagon!
Only if all nine sides are the same length.