16 diagonals* * * * *5. To all vertices except itself and one each on either side.
A undecagon has 44 diagonals. A dodecagon has 54 diagonals. An octagon has 20 diagonals. A heptagon has 14 diagonals.
A regular octagon has 8 sides.
People have counted 8 or 4 diagonals. If there was four, they might be missing other diagonals. 8 is the proper answer. If you look at other websites, they say 8 [most webs] . To my opinion, it's 8.
It has 20 diagonals and is made up by 6 triangles
An octagon has 16 diagonals.
There are 20 diagonals
None, if it is an irregular octagon.
there are 5, 6, or 7 diagonals in a pentagon
Sides: 8 Diagonals : 20
An octagon has four (4) diagonals, each connecting two opposite vertices.