Question

Find the circumference of each circle. Round to the nearest tenth.

Short answer

The circumference of the circle is 18.9 m.

Step-by-step solution

Step 1. Given information.

In the given figure, the circle has a radius of 3 m, i.e. $r=3\mathrm{m}$.

Step 2. Circumference of circle.

The circumference of a circle with radius r units is denoted by $C=2\pi r$.

Step 3. Calculations.

$$\begin{gathered} C=2\pi r \\ =2·\frac{22}{7}·3 \\ =18.8571\mathrm{m} \end{gathered}$$

Rounding off to the nearest tenth,

$C=18.9\mathrm{m}$

Thus, the circumference of the circle is $18.9\mathrm{m}$.