document.write( "Question 1031743: how do you find an exact circumference of a circle?
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Algebra.Com's Answer #646424 by ikleyn(52798) $\"\"$ $\"About$

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\n" ); document.write( "how do you find an exact circumference of a circle?
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\n" ); document.write( "\n" ); document.write( "Circumference \"C\" of the circle is\r
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\n" ); document.write( "\n" ); document.write( "C = $\"2%2Api%2AR\"$ ,\r
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\n" ); document.write( "\n" ); document.write( "where R is the circle's radius, or (which is the same)\r
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\n" ); document.write( "\n" ); document.write( "C = $\"pi%2AD\"$ ,\r
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\n" ); document.write( "\n" ); document.write( "where D is the circle's diameter.\r
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\n" ); document.write( "\n" ); document.write( "Here $\"pi\"$ is well known constant pi = 3.14159265 . . . , which is irrational number.\r
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