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Mathematics 12 Online
OpenStudy (anonymous):

Prove that the opposite angles of a parallelogram are congruent.

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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