State the theorem or principal that enables you to prove or deduce that quadrilateral PQRS is a parallelogram.

Please explain how you get to the answer. problems like these are going to be on my midterm and I need to know how to solve them Thank you so much for any help!

Line PQ is congruent to Line SR; Line PQ is parallel to Line SR:____________

Line PQ is parallel to Line SR; Line PS is parallel to Line QR: _______________

Angle PSR is congruent to Angle RQP; Angle SQR is congruent to Angle QPS: _______________________

Line PQ is congruent to Line SR; Line PS is congruent to Line QR:_______________________

PA = 1/2 Of PR; SA = 1/2 Of SQ: _______________________________