document.write( "Question 961931: the area of a square is 81 square centimeters. find the length of a side. find the length of the diagonal
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Algebra.Com's Answer #587700 by addingup(3677) $\"\"$ $\"About$

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The area of the square equals side squared, s^2. Therefore, a side equals to the square root of the area:
\n" ); document.write( " $\"sqrt%2881%29=+9\"$ That's the length of each side, 9.
\n" ); document.write( "If we trace a diagonal across the square, we are in fact dividing the square into 2 triangles, and the diagonal line is the hypotenuse.
\n" ); document.write( "Per Pythagoras:
\n" ); document.write( "The length of the hypotenuse equals the square root of the sum of the squares of the sides:
\n" ); document.write( " $\"sqrt%289%5E2%2B9%5E2%29=+12.73\"$
\n" ); document.write( "12.73 is the length of the diagonal \n" ); document.write( "

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