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OpenStudy (anonymous):
Prove that the opposite angles of a parallelogram are congruent.
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jhonyy9 (jhonyy9):
how do you know what property have the opposite sides of a paralleogramm ?
OpenStudy (anonymous):
I'm sorry, what do you mean?
jhonyy9 (jhonyy9):
parallelogramm sorry for missed l
jhonyy9 (jhonyy9):
so the opposite sides are equales and paralleles ,yes ?
jhonyy9 (jhonyy9):
so from these what resulte how do you think ?
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OpenStudy (anonymous):
Alternate interior angles theorem and angle addition postulate will serve nicely.
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