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Geometry 16 Online
OpenStudy (anonymous):

What statement is used to prove that quadrilateral ABCD is a parallelogram? a) Angles ABC and BCD are congruent. b) Sides AB and BC are congruent. c) Triangles BPA and DPC are congruent. d) Triangles BCP and CDP are congruent.

OpenStudy (anonymous):

jhonyy9 (jhonyy9):

how you decide that a quadrilateral is parallelogram or not ? what are the properties of parallelogram ?

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