document.write( "Question 715260: What is the lenght of the diagnal corners in a squre measuring 15meters by 15meters.
\n" ); document.write( "Thank you,
\n" ); document.write( "Doug
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Algebra.Com's Answer #439345 by Simnepi(216)\"\" \"About 
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Hi Doug
\n" ); document.write( "to find the diagonal of a square
\n" ); document.write( "we use pythagoras' theorem.
\n" ); document.write( "Draw a square and draw in the diagonal! look for the triangle!
\n" ); document.write( "Pythagoras theorem is \"a%5E2%2Bb%5E2=c%5E2\" where and and b are the lengths of the short sides and c is the length of the hypotenuse.
\n" ); document.write( "so, substituting values we get
\n" ); document.write( "\"15%5E2%2B15%5E2=c%5E2\"
\n" ); document.write( "therefore
\n" ); document.write( "\"225%2B225=c%5E2\"
\n" ); document.write( "so
\n" ); document.write( "\"c%5E2=450\"
\n" ); document.write( "to find c we take square roots i.e.
\n" ); document.write( "\"c=sqrt%28450%29\"
\n" ); document.write( "using a calculator we find
\n" ); document.write( "c=21.21 m to 2 decimal places
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