189
There are 5 diagonals
40
20.
18
four (4)
A 21-agon has 189 diagonals
153 diagonals.
There are 5 diagonals
You can draw 9 diagonals inside a hexagon.
40
fourteen. If you draw if diagonals from one vertex there are 14. fourteen. If you draw if diagonals from one vertex there are 14.
4 i think draw it out
20.
four (4)
18
20
4