## anonymous 3 years ago The length of arc AB = 9π and m∠AOB = 150°. What is the length of the radius of the circle?

1. anonymous

2. anonymous

use the proportion : 150/360 = arc AB/circumference circle 150/360 = 9π/2πr 5/12 = 9/2r solve for r

4. 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

5. anonymous

|dw:1365446535715:dw|

6. anonymous

correct!

8. anonymous

yes mam

9. anonymous

Solve the following for r, the radius.$\pi 2 r=\frac{360\ 9 \pi }{150}$r = 10.8

10. anonymous

thank you!

11. anonymous

np

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