document.write( "Question 329432: If the diagonal of a rectangle is 15 and the perimeter of the rectangle is 42, what is the area. \n" ); document.write( "

Algebra.Com's Answer #236249 by Fombitz(32388) $\"\"$ $\"About$

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Diagonal:
\n" ); document.write( " $\"D%5E2=L%5E2%2BW%5E2=15%5E2\"$
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\n" ); document.write( "Perimeter:
\n" ); document.write( " $\"2%28L%2BW%29=42\"$
\n" ); document.write( " $\"L%2BW=21\"$
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\n" ); document.write( "Area:
\n" ); document.write( " $\"A=LW\"$
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\n" ); document.write( ".
\n" ); document.write( " $\"%28L%2BW%29%5E2=L%5E2%2B2LW%2BW%5E2\"$
\n" ); document.write( " $\"%28L%2BW%29%5E2=%28L%5E2%2BW%5E2%29%2B2LW\"$
\n" ); document.write( " $\"21%5E2=15%5E2%2B2A\"$
\n" ); document.write( " $\"2A=21%5E2-15%5E2\"$
\n" ); document.write( " $\"A=%281%2F2%29%2821%5E2-15%5E2%29\"$
\n" ); document.write( " $\"A=%281%2F2%29%28441-225%29\"$
\n" ); document.write( " $\"A=%281%2F2%29%28216%29\"$
\n" ); document.write( " $\"A=108\"$ \n" ); document.write( "

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