In quadrilateral ABCD, diagonals AC and BD bisect one another: What statement is used to prove that quadrilateral ABCD is a parallelogram? Answers 1)Angles BAD and ADC are congruent. 2) Corresponding angles BCD and CDA are supplementary. 3)Sides CD and DA are congruent. 4)Triangles BPA and DPC are congruent.
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