document.write( "Question 256877: A square has a 40-cm diagonal. How long is each side of the square? Round your answer to the nearest tenth of a centimeter \n" ); document.write( "

Algebra.Com's Answer #188917 by drk(1908) $\"\"$ $\"About$

You can put this solution on YOUR website!
By Pythagorean theorem, we get
\n" ); document.write( " $\"a%5E2+%2B+b%5E2+=+c%5E2\"$
\n" ); document.write( "a = b and c = 40, so we get
\n" ); document.write( " $\"2a%5E2+=+40%5E2\"$
\n" ); document.write( " $\"2a%5E2+=+1600\"$
\n" ); document.write( " $\"a%5E2+=+800\"$
\n" ); document.write( "a ~ 28.3 cm \n" ); document.write( "

\n" );