document.write( "Question 215356: the perimeter of a square is 36 cm. find the length of the diagonal. \n" ); document.write( "
Algebra.Com's Answer #162811 by MathTherapy(10553)\"\" \"About 
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Since the perimeter of the square is 36 cm, then each side = \"36%2F4+=+9\" cm\r
\n" ); document.write( "\n" ); document.write( "By letting diagonal equal D, and using the Pythagorean formula, \"a%5E2+%2B+b%5E2+=+c%5E2\", we get: \"9%5E2+%2B+9%5E2+=+D%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"D%5E2+=+162\" ------- \"D+=+sqrt%28162%29\" = 12.73\r
\n" ); document.write( "\n" ); document.write( "Therefore, length of the diagonal, or D = \"highlight_green%2812.73%29\" cm.
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