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I NEED THE RIGHT ANSWER PLEASE HELP! WILL GIVE BRAINLIEST

What is the measure of the indicated central angle?

A) 10 degrees
B) 20 degrees
C) 30 degrees
D) 40 degrees
E) None of the above

I NEED THE RIGHT ANSWER PLEASE HELP WILL GIVE BRAINLIEST What is the measure of the indicated central angle A 10 degrees B 20 degrees C 30 degrees D 40 degrees class=

Respuesta :

wegnerkolmp2741o

Answer:

B) 20 degrees

Step-by-step explanation:

Arc length = fraction of the circle * circumference

Arc length = fraction of the circle * 2 * pi *r

pi  = fraction of the circle * 2 * pi *9

pi  = fraction of the circle *18 pi

Divide each side by 18pi

pi

-------- = fraction of a circle

18 pi

1/18 = fraction of a circle

A circle is 360 degrees

1/18 = x/360

Multiply by 360 on each side

360/18 = x

20=x