document.write( "Question 300350: How do you find the area of a rectangle having only the width and the diagonal? \n" ); document.write( "

Algebra.Com's Answer #215550 by Fombitz(32388) $\"\"$ $\"About$

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The width (W), length (L), and diagonal (D) form a right triangle which follows the Pythagorean theorem.
\n" ); document.write( " $\"W%5E2%2BL%5E2=D%5E2\"$
\n" ); document.write( " $\"L%5E2=D%5E2-W%5E2\"$
\n" ); document.write( " $\"L=sqrt%28D%5E2-W%5E2%29\"$
\n" ); document.write( "From that, then the area of a rectangle is
\n" ); document.write( " $\"A=L%2AW\"$
\n" ); document.write( " $\"highlight_green%28A=W%2Asqrt%28D%5E2-W%5E2%29%29\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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