Question

What is the radius of this circle if the circumference is 18 pi cm? A circle. C = 18 pi cm 3 cm 9 cm 18 cm 36 cm

Answer 1

9

Explanation:

Answer 2

9 cm

Explanation:

`\because \: C = 2\pi \: r \\ \\ \therefore \: 18\pi = 2\pi * r \\ \\ \therefore \: r = (18\pi)/(2\pi) \\ \\ \therefore \: r =9 \: cm`

Hence, radius of circle is 9 cm.