There are 20 diagonals
40
No, they do not.
no
20 diagonals For any n-sided polygon, the formula for the number of diagonals is (n/2) x (n-3), so for an octagon it is (8/2) x (8-3) = 4 x 5 = 20.
An octagon has 16 diagonals.
There are 20 diagonals
8 diagonals
4 diagonals
None, if it is an irregular octagon.
20
20
An octagon has four (4) diagonals, each connecting two opposite vertices.
there are 5, 6, or 7 diagonals in a pentagon
Sides: 8 Diagonals : 20
8
0.5*(82-24) = 20 diagonals