Question

Circle O has a circumference of 36π cm.

What is the length of the radius, r?

6 cm
18 cm
36 cm
72 cm

Answer 1

C=2piR
R=18cm if you solve the equation

Answer 2

Answer:-Thus radius of circle O=18 cm

Explanation:-

Circumference is the distance around the circle.

Circumference of circle
`=2\pi\ r`, wherer is the radius of the circle.

Given: Circumference of circle O
`=36\pi\ cm`

`\\\Rightarrow2\pi\ r=36\pi\\\Rightarrow\ r=18\ cm...........[\text{dividing }2\pi\text{ on both sides}]`

Thus radius of circle O=18 cm