Question

The circumference of a circle is 36π feet. What is the length of the radius of this circle?

9 ft
18 ft
36 ft
72 ft

Answer 1

B

Explanation:

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Answer 2

18 ft

Explanation:

The circumference of a circle is given by

C = 2 * pi *r

36 pi = 2 * pi *r

Divide by pi on each side

36 = 2 * r

Divide each side by 2

36/2 = 2r/2

18 =r