Write the number of diagonals of an n-sided polygon.

Find the number of diagonals of an n - sided polygon. In particular, find the number of diagonals when. a) n = 10 b) n = 15

Find the number of diagonals of a 16-sided polygon.

The number of diagonals for an n sided polygon is

The number of diagonals in a 27 - sided polygon is

A regular polygon has 20 sides. Find the number of diagonals of the polygon.

The number of diagonal for an n sided polygon with 10 sides is

If a polygon has 8 sides, then the number of diagonals of the polygon is _____.

If a polygon has 6 sides, then the number of diagonals of the polygon is _______