Answer:
A
Step-by-step explanation:
use s=r0
but first convert 360 degree to radian
you will get 6.284 radian
then you substitute and get the answer!
12= r (6.284)
r= 1.91 cm
12* 1/2 is 6. It is 6 because just like 6 times 2 is 12 1/2 times two is 12 it is really the same pretty much.