Question

The circumference of a circle is 18pi meters. What is the radius?Give the exact answer in simplest form. ____ meters. (pi, fraction)

Answer 1

Given:

The circumference of a circle, C=18π m.

The expression for the circumference of a circle is given by,

`C=2\pi r`

Put the value of C in the above equation to find the radius.

`\begin{gathered} 18\pi=2\pi r \\ r=(18\pi)/(2\pi) \\ r=9\text{ m} \end{gathered}`

Therefore, the radius of the circle is 9 m.