Question

Calculate the circumference of the circle below. Express the result as a decimal to the nearest 10th

Answer 1

Given a circle of radius r, the circumference of the circle is given by:

`C=2\pi r`

The figure shows a circle of radius r = 7 m.

Calculate the circumference:

`\begin{gathered} C=2\pi\cdot7m \\ C=14\pi\text{ m} \end{gathered}`

Calculating:

C = 14 * 3.1416

C = 43.98 m

Rounding to the nearest tenth:

C = 44.0 m