It has 20 diagonals and is made up by 6 triangles
4 diagonals
8 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
Sides: 8 Diagonals : 20
there are 5, 6, or 7 diagonals in a pentagon
An octagon has four (4) diagonals, each connecting two opposite vertices.