Question

what is the approximate circumference of the circle shown below? 15.5 cm o a. 97.3 cm b. 24.3 cm c. 48.7 cm d. 39.5 cm

Explanation:

Step1: Recall the formula for circumference

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 radius $r = 15.5$ cm.

Step2: Substitute the radius into the formula

Using $C = 2\pi r$, substitute $r = 15.5$ cm. So $C=2\times\pi\times15.5=31\pi$ cm.

Step3: Approximate the value

Take $\pi\approx 3.14$. Then $C\approx31\times3.14 = 97.34\approx97.3$ cm.

Answer:

A. 97.3 cm