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