document.write( "Question 486006: how do you tell if opposite sides of a parallelogram are congruent in coordinate proofs? \n" ); document.write( "
Algebra.Com's Answer #332305 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Use the Euclidian Parallel Postulate and the proof of its converse.\r
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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