anonymous
  • anonymous
find the circumferance of a circle whose area is 100m. please help :) thanks so much
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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amistre64
  • amistre64
C = 2pi r A = pi r^2 100/pi = r^2 C = 2pi(sqrt(100/pi))
amistre64
  • amistre64
20pi ------ looks wierd lol sqrt(pi)
amistre64
  • amistre64
its abt 35.5

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anonymous
  • anonymous
its radius is 10 over square root of pi. so its circumference is 2pir 2pi(10/square root of pi) = 35.45
anonymous
  • anonymous
pi r^2 = area of circle. pi r^2 = 100 Solve for r above.\[r=\frac{10}{\sqrt{\pi }} \]\[c=\pi\text{ 2 r}=\pi\text{ 2}\left(\frac{10}{\sqrt{\pi }}\right)=20 \sqrt{\pi } \]

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