document.write( "Question 1111092: A contractor has been hired to pour a rectangular concrete patio. How can he be sure that the frame in which he will pour the concrete is rectangular? \n" ); document.write( "
Algebra.Com's Answer #726099 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( "If two diagonals are of equal length, it usually is considered as a good test.\r
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