document.write( "Question 4809: How do I find the radius of a circle whose circumference is 28 inches? \n" ); document.write( "

Algebra.Com's Answer #2308 by rapaljer(4671) $\"\"$ $\"About$

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$\"C+=+2+%2A+pi+%2A+r+\"$ , so if you know the circumference C = 28 in, then the unknown is r. Divide both sides by $\"2+pi\"$ :\r
\n" ); document.write( "\n" ); document.write( " $\"20+=+2%2A+pi+%2Ar\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"20%2F%282+%2Api%29+=+%282+%2Api+%2Ar%29%2F%282+%2Api%29\"$
\n" ); document.write( " $\"10%2F+pi+=+r+\"$ \r
\n" ); document.write( "\n" ); document.write( "r = 3.18 in. (approximately)\r
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\n" ); document.write( "\n" ); document.write( "R^ at SCC \n" ); document.write( "

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