It has 27.
It has 9 sides and it can be an regular or a irregular polygon which is called a nonagon Check: 0.5*(81-27) = 27 diagonals
it depends on what you mean by a diagonal. If you take a diagonal to mean a line from one corner to the "opposite" corner, then a nonagon doesn't have any, and a decagon has five. The reason a nonagon doesn't have any, is that the corners aren't opposite each other.
nonagon
A nonagon is a 2D shape so you cannot make a 3D nonagon!
A Nonagon has 36 diagonals
24 diagonals
It has 27 diagonals
9 diagonals
27 diagonals
It can have.
Not in general.
27
It is: 0.5*(92-3*9) = 27 diagonals in a 9 sided nonagon
It has 27.
A nine sided nonagon has 27 diagonals
nonagon