number 17... .........,..

Answer:the circumference is 18 radius is 9
Step-by-step explanation: radius is half of the diameter half of 18=9 and circumference is always the same # as diameter
Answer:
Step-by-step explanation:
Circumference = 2(pi)(r)
2(pi)(9)
=56.548
radius = Diameter/ 2
18/2 = 9
radius = 9