document.write( "Question 249789: If the diagonal of a square is 9 units long, how long is each side? \n" ); document.write( "
Algebra.Com's Answer #181867 by mathhub(11)\"\" \"About 
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The diagonal (d) of a square is given by\r
\n" ); document.write( "\n" ); document.write( "d = sqrt(2a*a) \r
\n" ); document.write( "\n" ); document.write( "where a is the side of the square.\r
\n" ); document.write( "\n" ); document.write( "Squaring both sides we get\r
\n" ); document.write( "\n" ); document.write( "\"d%2Ad+=+2%2Aa%2Aa\"
\n" ); document.write( "=> \"9%2A9+=+2%2Aa%2Aa\"
\n" ); document.write( "=> \"81+=+2%2Aa%2Aa\"
\n" ); document.write( "=> \"81%2F2+=+a%2Aa\"
\n" ); document.write( "=> \"40.5+=+a%2Aa\"
\n" ); document.write( "=> \"a+=+sqrt%2840.5%29\"
\n" ); document.write( "=> a = 6.3639\r
\n" ); document.write( "\n" ); document.write( "Therefore the side of the square is 6.3639 units.
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