document.write( "Question 198630: find the area of a circle with a circumference of 20(pie)
\n" ); document.write( "*pie= 3.14 \n" ); document.write( "
Algebra.Com's Answer #149155 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
find the area of a circle with a circumference of 20(pi)
\n" ); document.write( ".
\n" ); document.write( "Since the equation for circumference is:
\n" ); document.write( "Circumference = 2(pi)r
\n" ); document.write( ".
\n" ); document.write( "And, since they told us circumference is 20(pi) we now have:
\n" ); document.write( "20(pi) = 2(pi)r
\n" ); document.write( "20 = 2r
\n" ); document.write( "10 = r
\n" ); document.write( ".
\n" ); document.write( "Area of a circle is (pi)r^2
\n" ); document.write( "Therefore:
\n" ); document.write( "area = (pi)(10)^2
\n" ); document.write( "area = (3.14)(10)^2
\n" ); document.write( "area = (3.14)(100)
\n" ); document.write( "area = 314 square units\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );