document.write( "Question 728741: Describe how to find the area of a circle when given only the circumference of the circle. \n" ); document.write( "
Algebra.Com's Answer #445578 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "It's better to get the formula for A in terms of C, which\r\n" );
document.write( "amounts to the rule:\r\n" );
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document.write( "\"Square the circumference and divide by 4p\"\r\n" );
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document.write( "The formulas are:\r\n" );
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document.write( "C = 2pr  \r\n" );
document.write( "A = prē\r\n" );
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document.write( "We solve the circumference equation for r:\r\n" );
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document.write( "C = 2pr\r\n" );
document.write( "\"C%2F%282pi%29\" = r\r\n" );
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document.write( "Substitute that for r in the area formula\r\n" );
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document.write( "A = \"pi\"\"%28C%2F%282pi%29%29%5E2\"\r\n" );
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document.write( "A = \"pi\"\"C%5E2%2F%282%5E2pi%5E2%29\"\r\n" );
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document.write( "A = \"pi\"\"C%5E2%2F%284pi%5E2%29\"\r\n" );
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document.write( "A = \"cross%28pi%29\"\"C%5E2%2F%284pi%5Ecross%282%29%29\"\r\n" );
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document.write( "A = \"C%5E2%2F%284pi%29\"\r\n" );
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document.write( "Square the circumference and divide by 4p,\r\n" );
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document.write( "Edwin
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