4 diagonals
An octagon has 16 diagonals.
None, if it is an irregular octagon.
An octagon has four (4) diagonals, each connecting two opposite vertices.
8
0.5*(82-24) = 20 diagonals
8 diagonals
It has 20 diagonals and is made up by 6 triangles
no
An octagon has 16 diagonals.
There are 20 diagonals
19 * * * * * The correct answer is 8*(8-3)/2 = 20
16 diagonals* * * * *5. To all vertices except itself and one each on either side.
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