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Q&A #3945

Teachers' Lounge Discussion: Coordinate proofs

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From: Ritchie Toussaint <ThickDelux305@aol.com>
To: Teacher2Teacher Public Discussion
Date: 2003021718:00:10
Subject: Coordinate Proofs

Please help me!
How can I write a coordinate proof to show that the diagonals of a
rectangle are congruent?






Also,
     How can I find the perimeter and area of Triangle ABC if 
     A= (-4,3)
     B=(11,3)
     C=(11,11)

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