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  • 30-11-2014
  • Mathematics
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solve for r: A=2 pi r squared

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Аноним Аноним
  • 30-11-2014
[tex]A= 2\pi r^2 \\ \frac{A}{2 \pi} =r^2 \\ r= \sqrt{\frac{A}{2 \pi}} [/tex]
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