Fill ups
A quadrilateral is a parallelogram if both pairs of opposite angles is………………. .

A quadrilateral is a parallelogram, if its one pair of opposite sides are equal and parallel.

Draw a rough figure of a quadrilateral that is not a parallelogram but has exactly two opposite angles of equal measure.

Given the following statement : If the diagonals of a quadrilateral do not bisect each other, then the quadrilateral is not a parallelogram. Identify these as contrapositive or converse of each other.

Fill ups In a parallelogram the opposite sids are……………. .

Can a quadrilateral ABCD be a parallelogram if : angle D+angleB=180^@ ?

Given statement below. Identify the statement given below as contrapositive or converse of each other. 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.