document.write( "Question 1053309: what is the circumference of a circle if the area is 25pi meters squared? \n" ); document.write( "

Algebra.Com's Answer #668595 by Fombitz(32388) $\"\"$ $\"About$

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Find the relationship between area and circumference for a circle.
\n" ); document.write( " $\"C=2pi%2AR\"$
\n" ); document.write( " $\"A=pi%2AR%5E2\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"R=C%2F%282pi%29\"$
\n" ); document.write( " $\"R%5E2=C%5E2%2F%284pi%5E2%29\"$
\n" ); document.write( "Substituting into the area equation,
\n" ); document.write( " $\"A=pi%2A%28C%5E2%2F%284pi%5E2%29%29\"$
\n" ); document.write( " $\"A=C%5E2%2F%284pi%29\"$
\n" ); document.write( "So now,
\n" ); document.write( " $\"25pi=C%5E2%2F%284pi%29\"$
\n" ); document.write( " $\"C%5E2=100pi%5E2\"$
\n" ); document.write( " $\"C=10pi\"$
\n" ); document.write( " \n" ); document.write( "

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