document.write( "Question 114931: I really need help with this problem I just dont understand.\r
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Algebra.Com's Answer #83638 by edjones(8007)\"\" \"About 
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Make a square on a piece of paper. Mark the upper left corner \"A\" and write (-1,2a). on the upper right corner write \"B\" (a,2a). On the lower right write \"C\" (-a,0) and on the lower left write D. D has to be (-1,0) as you can plainly see.
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