Question

The radius of a circle is 7 meters. what is the length of a 180 degree arc?

Answer 1

Given

Radius, r = 7m

The formula for calculating the length of an arc is

`\begin{gathered} l=(\theta)/(360)\text{ x 2}\pi r \\ \end{gathered}`
`\begin{gathered} \text{But }\theta=180^0(Given) \\ l=(180)/(360)\text{ x 2}\pi\text{ x7} \\ l=7\pi \end{gathered}`