Find the number of diagonals by joining the vertices of a polygon of n sides.

Consider a convex polygon, which has 44 diagonals, then the number of triangles formed by joining the vertices of polygon in which exactly one side is common in triangle and polygon, is

The number of triangle that can be formed by joining the vertices of a regular polygon of n sides is

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

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

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

Diagonal joins any two adjacent vertices of a polygon .

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

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

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

Find the number of diagonals of a polygon of 20 sides