Q12. - Algebra 1

Question

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

Step-by-Step Solution

Answer

The circumference of the circle is 75.4 cm.

Step 1. Given information.

In the figure, the circle has a radius of 12 cm, i.e. $r=12\mathrm{cm}$.

Step 2. Circumference of the circle.

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

Step 3. Calculations.

The circumference of a circle.

$$\begin{gathered} C=2\pi r \\ =2·\frac{22}{7}·12 \\ =75.428\mathrm{cm} \end{gathered}$$

Rounding off to the nearest tenth,

$C=75.4\mathrm{cm}$

Thus, the circumference of the circle is 75.4 cm.