document.write( "Question 107334: Find the area of a rectangle with length 4 and diagonal 5. \n" ); document.write( "

Algebra.Com's Answer #78218 by elima(1433) $\"\"$ $\"About$

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Find the area of a rectangle with length 4 and diagonal 5.
\n" ); document.write( "You need to start by finding the width of the rectangle, you do that by the Pythagorean theorem. One leg = 4, hypotenuse=5;
\n" ); document.write( " $\"a%5E2%2Bb%5E2=c%5E2\"$
\n" ); document.write( " $\"4%5E2%2Bb%5E2=5%5E2\"$
\n" ); document.write( " $\"4%5E2-5%5E2=b%5E2\"$
\n" ); document.write( " $\"sqrt%2816-25%29=sqrt%28b%29\"$
\n" ); document.write( " $\"b=sqrt%289%29\"$ so the width would be 3;
\n" ); document.write( "Now we can find the area;
\n" ); document.write( "A=LW
\n" ); document.write( "A=4(3)
\n" ); document.write( "A=12
\n" ); document.write( ":)\r
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