document.write( "Question 650021: find the length of a radius of a circle whose area and circumference are the same non zero number \n" ); document.write( "

Algebra.Com's Answer #407135 by swincher4391(1107) $\"\"$ $\"About$

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Find r such that pir^2 = 2pir\r
\n" ); document.write( "\n" ); document.write( " $\"pi+%2A+r%5E2+=+2%2Api%2Ar\"$
\n" ); document.write( "Divide both sides by pi\r
\n" ); document.write( "\n" ); document.write( " $\"r%5E2+=+2r\"$
\n" ); document.write( " $\"r%5E2-2r+=+0\"$
\n" ); document.write( " $\"r%28r-2%29+=+0\"$
\n" ); document.write( "r= 0 or r=2\r
\n" ); document.write( "\n" ); document.write( "r=2 is the only non-zero number that fits the bill.\r
\n" ); document.write( "\n" ); document.write( "2. \n" ); document.write( "

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