n(n - 3)/2. where n is the number of sides in the shape
35 diagonals
There are 54 diagonals in a 12 sided shape
it's a 12 sided shape and it has 54 diagonals :D
There are: 0.5*(10002-3000) = 498,500 diagonals
There are 275 diagonals in a shape with 25 sides. The formula is n*(n-3)/2
1/2*(1002-300) = 4850 diagonals
8
Number of diagonals = 18*(18-3)/2 = 135
A nanogon has no diagonals because there is no such shape. A nonagon, on the other hand, has 9*(9-3)/2 = 27 diagonals.
I am sure that a shape with six side has 9 diagonals. (I found out cause I really wanted to help people.)
Depends on the shape.
corn dogs