document.write( "Question 717014: How do I find the circumference of a circle when I only know the area?\r
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\n" ); document.write( "\n" ); document.write( "I know the area is 64pi miles^2. How do I use that information to find the circumference? \r
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\n" ); document.write( "\n" ); document.write( "Also is the 64 the radius or the diameter?
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Algebra.Com's Answer #440057 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
The formula for area is
\n" ); document.write( "\"+A+=+pi%2Ar%5E2+\"
\n" ); document.write( "You can solve this for radius
\n" ); document.write( "\"+r%5E2+=+A+%2F+pi+\"
\n" ); document.write( "\"+r+=+sqrt%28+A%2Fpi+%29+\"
\n" ); document.write( "You are given that
\n" ); document.write( "\"+A+=+64%2Api+\", so
\n" ); document.write( "\"+r+=+sqrt%28+64%2Api+%2F+pi+%29+\"
\n" ); document.write( "\"+r+=+sqrt%28+64+%29+\"
\n" ); document.write( "\"+r+=+8+\"
\n" ); document.write( "---------
\n" ); document.write( "The formula for circumference is
\n" ); document.write( "\"+C+=+2%2Api%2Ar+\"
\n" ); document.write( "\"+C+=+2%2Api%2A8+\"
\n" ); document.write( "\"+C+=+16%2Api+\" answer\r
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