The only shape you can make is a parallelogram. If both pairs of opposite angles of a quadrilateral are congruent, then it's a parallelogram (converse of a property). If the diagonals of a quadrilateral bisect each other, then it's a parallelogram (converse of a property).
If both pairs of opposite angles of a quadrilateral are congruent, then it's a parallelogram. If the diagonals of a quadrilateral bisect each other, then it's a parallelogram.
