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OpenStudy (marcellesitt):
which of the following are necessary when proving that the opposite angles of a parallelogram are congruent A. corresponding parts of similar triangles are similar B. opposite sides are perpendicular c. corresponding parts of congruent triangles are congruent D. opposite sides are congruent
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OpenStudy (marcellesitt):
Please help!!!
OpenStudy (acespeedfighter):
ITs C
OpenStudy (marcellesitt):
can it be C and another or only C?
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