anonymous
  • anonymous
The length of arc AB = 9π and m∠AOB = 150°. What is the length of the radius of the circle?
Geometry
katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
@RadEn can you help me, please?
RadEn
  • RadEn
use the proportion : 150/360 = arc AB/circumference circle 150/360 = 9π/2πr 5/12 = 9/2r solve for r

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anonymous
  • anonymous
9? = 2?r(150/360) r = 10.8 unites 2? = (1/2)(x)3^2, where x is the measure of ?COD in rad. x = 4?/9 rad = 80 degrees im for sure
anonymous
  • anonymous
|dw:1365446535715:dw|
anonymous
  • anonymous
@RadEn is that right?
RadEn
  • RadEn
correct!
anonymous
  • anonymous
yes mam
anonymous
  • anonymous
Solve the following for r, the radius.\[\pi 2 r=\frac{360\ 9 \pi }{150} \]r = 10.8
anonymous
  • anonymous
thank you!
anonymous
  • anonymous
np

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