Proving a Quadrilateral is a Parallelogram
Which criteria alone are sufficient to prove that a quadrilateral is a parallelogram?
1 pair of congruent opposite angles
1 pair of congruent opposite sides
1 pair of parallel and congruent opposite sides
2 pairs of congruent opposite angles
2 pairs of congruent opposite sides
both diagonals bisect each other
1 diagonal is bisected by the other
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Információ: Proving a Quadrilateral is a Parallelogram