document.write( "Question 1003494: In a rectangle, one side is 1/3 of the length of the other side and the length of a diagonal is 9 feet, how long are the sides of the rectangle?
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #620184 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
\r
\n" ); document.write( "\n" ); document.write( "one side is \"1%2F3\" of the length of the other side:
\n" ); document.write( "if longer side is \"a\" and shorter side is \"b\", then we have:
\n" ); document.write( "
\n" ); document.write( "\"b=%281%2F3%29a\".........eq.1\r
\n" ); document.write( "\n" ); document.write( "and if the length of a diagonal is \"d=9ft\", we need to use Pythagorean theorem because two sides of rectangle and its diagonal form right angle triangle\r
\n" ); document.write( "\n" ); document.write( "so, we have \"d%5E2=a%5E2%2Bb%5E2\"\r
\n" ); document.write( "\n" ); document.write( "substitute \"b\" from eq.1, and \"d\"\r
\n" ); document.write( "\n" ); document.write( "\"%289ft%29%5E2=a%5E2%2B%28%281%2F3%29a%29%5E2\"........solve for \"a\"\r
\n" ); document.write( "\n" ); document.write( "\"81ft%5E2=a%5E2%2B%281%2F9%29a%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"81ft%5E2=9a%5E2%2F9%2Ba%5E2%2F9\"\r
\n" ); document.write( "\n" ); document.write( "\"81ft%5E2=10a%5E2%2F9\"\r
\n" ); document.write( "\n" ); document.write( "\"81ft%5E2%2A9=10a%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"729ft%5E2=10a%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"729ft%5E2%2F10=a%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"72.9ft%5E2=a%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"a=sqrt%2872.9ft%5E2%29\"\r
\n" ); document.write( "\n" ); document.write( "\"a=8.54ft\"\r
\n" ); document.write( "\n" ); document.write( "then \"b=%281%2F3%29a=8.54ft%2F3=2.85ft\"\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );