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## Sariah 3 years ago Convert the angle in radians to degrees. \LARGE \frac{12\pi}{9}

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1. Sariah

|dw:1322510982773:dw|

2. cwrw238

use the identity pi radians = 180 degrees

3. Sariah

a. 240 b. 239 c. 242 d. 241

4. Sariah

One of this answer is right. a. 240 b. 239 c. 242 d. 241

5. cwrw238

pi rad = 180 degrees 1 .......= 180/pi 12pi/9 rads = 12 * pi * 180 degrees ----------- 9 * pi

6. cwrw238

can you pick it up from here?

7. Sariah

But the teacher said that i have to choose one answer from the nex answers: a. 240 b. 239 c. 242 d. 241

8. cwrw238

yup - but you can work it out from the formula i gave you - that is 12 * pi * 180 degrees ----------- 9 * pi can you work this out?

9. cwrw238

the pi's cancel out to give 12* 180 ------- 9 9 divides into 180 20 times so this gives 12* 20 = 240 the answer is a. 240

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