document.write( "Question 647385: One side of a rectangle is 6 feet long and the diagonal is 14 feet long. Find the length of the other side of the rectangle. \n" ); document.write( "
Algebra.Com's Answer #406167 by Sarpi(32)\"\" \"About 
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A diagonal line divides the rectangle in two shape of \"right-angle triangle\"
\n" ); document.write( "So the diagonal = 'hypotenuse' of the right-angle triangle = 14ft
\n" ); document.write( "and the width = the 'opposite' of the right-angle triangle = 6ft (that is taking into account down part of the rectangle after dividing it)\r
\n" ); document.write( "\n" ); document.write( "Now, the question becomes a problem of trigonometry - 'square of hypotenuse' is equal to 'sum square of both the opposite and the adjacent'; \"H%5E2+=+O%5E2+%2B+A%5E2\"\r
\n" ); document.write( "\n" ); document.write( "=> H = 14ft, O = 6ft and we look for A
\n" ); document.write( "=> \"H%5E2+=+O%5E2+%2B+A%5E2\"
\n" ); document.write( "\"14%5E2+=+6%5E2+%2B+A%5E2\"
\n" ); document.write( "\"196+=+36+%2B+A%5E2\"
\n" ); document.write( "\"196+-+36+=+A%5E2\"
\n" ); document.write( "\"160+=+A%5E2\"
\n" ); document.write( "Then by taking square root of both sides: \"A%5E2\" will become 'A' and 160 will be \"sqrt%28160%29\"\r
\n" ); document.write( "\n" ); document.write( "=> \"sqrt%28160%29+=+A\"
\n" ); document.write( "\"12.649+=+A\"
\n" ); document.write( "Hence, A = 12.649, so approximately the length of the other side is 12.6ft
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