In the circle, segment AB is a diameter. If the length of arc ACB is 6pi, what is the length if the radius of the circle?

Arc ACB would be 1/2 of the circle

the WHOLE circle would be pi x diameter = ABpi

so 1/2 of ABpi = 6pi

1/2 ABpi = 6pi

AB =12 this is the diameter..... radius would be 6 units