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Mathematics 9 Online
OpenStudy (anonymous):

The circumference C of a circle is the product of 2, pie, and the radius r.

OpenStudy (campbell_st):

thats correct

OpenStudy (campbell_st):

actually its pi... just remember twinkle twinkle little star the circumference of a circle is 2 pi r

OpenStudy (anonymous):

oh sorry i didn't state this in the question i need to turn it into an equation

OpenStudy (anonymous):

c=2*pi*r

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