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OpenStudy (anonymous):
Prove that the opposite angles of a parallelogram are congruent
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OpenStudy (anonymous):
OpenStudy (anonymous):
can you prove that triangles ABD and BCD are congruent?
OpenStudy (anonymous):
i dont know nothing about this stuff
OpenStudy (anonymous):
congruent triangles?
OpenStudy (anonymous):
what about them?
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OpenStudy (anonymous):
SSS,ASA,SAS do you know these?
OpenStudy (anonymous):
yeah side side side? angle side angle side angle side
OpenStudy (anonymous):
good,BC=AD(opposite sides of a parallelogram) AB=CD(like above) BD is a common side =>the 2 triangles are congruent by SSS =>angle 3=angle 1 similarly for angles 2 and 4
OpenStudy (anonymous):
thank u for your help
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