given: ab -cd and bc prove: abcd is a parallelogram ......theorem 6.11 - if the diagonals of a quad....

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Page 1: Given: AB -CD and BC Prove: ABCD is a parallelogram ......Theorem 6.11 - If the diagonals of a quad. bisect each other Theorem 6.12 - If one pair of opposite sides of a quad. are congruent
Page 2: Given: AB -CD and BC Prove: ABCD is a parallelogram ......Theorem 6.11 - If the diagonals of a quad. bisect each other Theorem 6.12 - If one pair of opposite sides of a quad. are congruent