document.write( "Question 174625: The perimeter of a square whose area is 81 square centimeters is? \n" ); document.write( "

Algebra.Com's Answer #129651 by josmiceli(19441) $\"\"$ $\"About$

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All 4 sides of a square are equal in length
\n" ); document.write( "Let each side of the square = $\"x\"$
\n" ); document.write( "The perimeter will = $\"4x\"$
\n" ); document.write( "The area of any rectangle = length x width
\n" ); document.write( "In the square, the legth and width are the same, so
\n" ); document.write( "Area = $\"x%5E2\"$
\n" ); document.write( "It is given that
\n" ); document.write( "Area = $\"81\"$ cm2 , so
\n" ); document.write( " $\"81+=+x%5E2\"$
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( " $\"x+=+9\"$ cm
\n" ); document.write( "Since the perimeter = $\"4x\"$
\n" ); document.write( "Perimeter = $\"4%2A9+=+36\"$ cm \n" ); document.write( "

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