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OpenStudy (anonymous):
Prove that the opposite angles of a parallelogram are congruent.
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OpenStudy (anonymous):
thi is the shape and I have no clue how to do ths.
OpenStudy (anonymous):
Use the SSS Postulate. One side is congruent by reflexive property. THe others are proved by a theorem in which opposite sides are congruent. Then, one the two triangles are proved congruent, then all parts are congruent since the triangle is congruent.
OpenStudy (anonymous):
Thanks this is very helpful(:
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