Question

what is the approximate circumference of the circle shown below? a 12.2 cm a. 19.2 cm b. 76.6 cm c. 38.3 cm d. 48.8 cm

Explanation:

Step1: Recall circumference formula

The formula for the circumference of a circle is $C = 2\pi r$ or $C=\pi d$, where $r$ is the radius and $d$ is the diameter. Here the diameter $d = 12.2$ cm.

Step2: Calculate the circumference

Using $C=\pi d$, and taking $\pi\approx3.14$, we have $C\approx3.14\times12.2 = 38.308\approx38.3$ cm.

Answer:

C. 38.3 cm