It has 27 diagonals
9 diagonals
A nonagon has 9 sides and 9 angles.
A undecagon has 44 diagonals. A dodecagon has 54 diagonals. An octagon has 20 diagonals. A heptagon has 14 diagonals.
2 diagonals
Not in general.
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
There are 9 vertices in a nonagon.
In a regular nonagon no two sides are parallel.
it has 44 diagonals :D
A pentagon has 5 diagonals.
If you mean a triskaidecagon then it has 65 diagonals
A nonagon is composed of nine straight sides and nine edges (or angles).
there are 5, 6, or 7 diagonals in a pentagon
It has two diagonals, and they are perpendicular to each other.
10080
There are: 0.5*(942-(3*94)) = 4277 diagonals