Let's begin with recalling the Conditions of Parallelograms.
If both pairs of opposite sides of a quadrilateral are congruent,
then the quadrilateral is a parallelogram.
If both pairs of opposite angles of a quadrilateral are congruent,
If the diagonals of a quadrilateral bisect each other,
If one pair of opposite sides of a quadrilateral is both parallel and congruent,
We can determine the shape of a quadrilateral by checking if any of the above conditions is satisfied. If so, then we can say that this quadrilateral is a parallelogram.
