Find the number of diagonals that can be drawn by joining the angular points of a
a polygon of 20 sides.

Find the number of diagonals that can be drawn by joining the angular points of a heptagon.

Find the number of diagonals that can be drawn by joining the angular ponts of decagon .

The number of diagonals that can be drawn by joining the vertices of an octagon is a. 20 b. 28 c. 8 d. 16

Find the number of triangles whose angular points are at the angular points of a given polygon of n sides, but none of whose sides are the sides of the polygon.

The number of diagonals of a polygon of 20 of sides

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

Find the number of triangles which can be formed having vertices at angular points of a convex polygon of m sides.

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

The number of diagonals of a polygon of 15 sides is:

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