Find number of quadrilaterals formed in an octagon having two sides common with the polygon.

by using the vertices of a regular polygon of 12 sides,Pentagon's are formed.then no of Pentagons having no side common with the given polygon

Find the number of diagonals in a polygon having 10 sides.

Find the number of diagonals of a polygon having sides 10.

Find the number of diagonals of a polygon having 20 sides

Number of triangles that can be made using the vertices of a polygon of 10 sides as their vertices and having exactly one side common with the polygon is 10k, then k =

Find the number of sides of a polygon having 44 diagonals.

Find the number of sides of a polygon having 44 diagonals.

Number of quadrilaterals which can be constructed by joining the vertices of a convex polygon of 20 sides if none of the side of the polygon is also the side of the quadrilateral is

Number of quadrilaterals which can be constructed by joining the vertices of a convex polygon of 20 sides if none of the side of the polygon is also the side of the quadrilateral is