An octagon has 16 diagonals.
There are 20 diagonals
8 diagonals
4 diagonals
No, they do not.
20
An octagon has four (4) diagonals, each connecting two opposite vertices.
An Octagon has 20 diagonals in total. There is actually a really simple formula to figuring out the diagonals in any polygon: (n-3) x (n/2). If we put 8 in there than it would be (8-3) x (8/2) - 5x4=20, so the answer is 20 diagonals.
None, if it is an irregular octagon.
there are 5, 6, or 7 diagonals in a pentagon
Sides: 8 Diagonals : 20
no