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October 21, 2014

October 21, 2014

Posted by **syram** on Thursday, March 21, 2013 at 3:38pm.

- Math, Algebra -
**Steve**, Thursday, March 21, 2013 at 4:16pmr = C/2pi

a = pi r^2 = pi * (C/2pi)^2 = C^2/(4pi)

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