Which method would prove the quadrilateral is a parallelogram?
A. Both pairs of opposite sides are parallel.
B. Both pairs of opposite sides are congruent.
C. One pair of opposite sides is both parallel and congruent.
D. Both pairs of opposite angles are congruent.
Answer: Each pair of opposite sides has the same measure. Therefore, they are congruent. If both pairs of opposite sides of a quadrilateral are congruent, the quadrilateral is a parallelogram.
