## anonymous one year ago Find the area of a sector with a central angle of 216 degrees and a radius of 18.4 millimeters and round to the nearest tenth. Help please!

1. anonymous

do u know formula $A=\frac{ 1 }{ 2 } r ^{2} \theta$

2. anonymous

No. I missed a day of class and that was the only day my teacher went over that and I have an assignment on it. :(

3. anonymous

dont use the formula i gave u its in radians

4. anonymous

Oh okay.

5. anonymous

area =$\pi r ^{2} (\frac{ c }{ 360 })$

6. anonymous

c is the central angle in ur case its 216

7. anonymous

$\pi 18.4^{2} \times \frac{ 216 }{ 360 } =638.1705653 mm ^{2}$

8. anonymous

got it?

9. anonymous

So that's the formula I should use?

10. anonymous

yes

11. anonymous

Awesome, thank you so much!

12. anonymous

$area= \pi r ^{2}\times \frac{ c }{ 360 }$

13. anonymous

no worries :)