document.write( "Question 383546: how do you find the perimeter of a rectangle if the diagonal is 15cm and the length of one side is 8com? \n" ); document.write( "

Algebra.Com's Answer #271596 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
You can find the length of the other side using the Pythagorean theorem.
\n" ); document.write( " $\"L%5E2%2BW%5E2=D%5E2\"$
\n" ); document.write( " $\"8%5E2%2BW%5E2=15%5E2\"$
\n" ); document.write( " $\"64%2BW%5E2=225\"$
\n" ); document.write( " $\"W%5E2=161\"$
\n" ); document.write( " $\"W=sqrt%28161%29\"$
\n" ); document.write( "The perimeter is then,
\n" ); document.write( " $\"P=2%2A%28L%2BW%29\"$
\n" ); document.write( " $\"highlight%28P=2%2A%288%2Bsqrt%28161%29%29%29\"$ cm
\n" ); document.write( " \n" ); document.write( "

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