The Number of diagonals of a Quadrilateral is …………….

Number of vertices of a quadrilateral is …………….

No. of diagonals of a rectangle is ……………….

The sum of four angles of a quadrilateral is

Number of sides in a Quadrilateral is ______

Sum of the angles in a quadrilateral is ……….

The number oif diagonals of an octagons is

One of the diagonals of the quadrilateral ABCD is

Given statements in (a) and (b). Identify the statements given below as contrapositive or converse of each other. (b) If a quadrilateral is a parallelogram, then its diagonals bisect each other. (i) If the diagonals of a quadrilateral do not bisect each other, then the quadrilateral is not a parallelogram. (ii) If the diagonals of a quadrilateral bisect each other, then it is a parallelogram.

The diagonals of a quadrilateral ABCD intersect each other at point'O' such that (AO)/(BO)=(CO)/(DO) . Prove that ABCD is a trapezium.

The number of diagonals for an n sided polygon is