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Mathematics 23 Online
OpenStudy (anonymous):

Prove that the opposite angles of a parallelogram are congruent.

OpenStudy (anonymous):

OpenStudy (anonymous):

pick any two opposite vertices and notice that the diagnol breaks up them up into two angles... use the fact that alternate interior angles are congruent given a pair of parallel lines.

OpenStudy (anonymous):

ok i chose ∠A and ∠C . now ow would i word it?

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