IDNLearn.com: Your reliable source for finding expert answers. Discover in-depth answers to your questions from our community of experienced professionals.
Answer:
radius=2
Step-by-step explanation:
if the circumference=4pi and the formula is 2pir then r must be 2 and would look like this:
C = 2pir
C = 2pi2
C = 2*2pi
C = 4pi