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

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

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

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

A quadrilateral is parallelogram; if itsone pair of opposite sides are equal and parallel

Parallelogram a quadrilateral is a parallelogram if its both pairs of opposite sides are parallel.

Parallelogram a quadrilateral is a parallelogram if its both pairs of opposite sides are parallel.

The converse of the above properties are also true i.e.(i) A quadrilateral is a parallelogram if its opposite sides are equal.(ii)A quadrilateral is a parallelogram if its opposite angles are equal.(iii) A quadrilateral is a parallelogram if it has one pair of opposite sides parallel and equal.(iv) A quadrilateral is a parallelogram if its diagonals bisect each other .

A quadrilateral is a parallelogram if its opposite sides are equal.

A quadrilateral is a parallelogram if its opposite sides are equal.