Find the number of diagonals in the convex polygon of n sides .

Find the numbers of diagonals in the polygon of n sides.

Find the numbers of diagonals in the polygon of n sides.

The number of diagonals in a polygon of seven sides is

The number of diagonals of a regular polygon of n sides are:

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

The number of diagonals of a convex polygon of sides n is equal to (n(n-3))/(2) . Find the number of diagonals is hexagon.

The number of diagonals in a convex polygon with number of sides 4 are:

Find the number of diagonals in a polygon with n sides.