Question

What is the radius of of a circle with a circumference of 36π cm?

A.
18 cm

B.
36 cm

C.
18π cm

D.
72 cm

Answer 1

I hope this helps you




Circumference=2pi.r



36pi.=2pi.r



r=36/2



r=18

Answer 2

The formula is simply this: C = πd where C is the circumference, pi is equal to 3.1416 and d is the diameter which equal to twice the radius. We use this equation to calculate for radius. We do as follows:

C = πd
36π = πd
d = 36

d = 2r
36 = 2r
r = 18 cm <--------OPTION A