Question

question 1 of 10 what is the approximate circumference of the circle shown below? 13.8 cm a a. 21.7 cm b. 86.7 cm c. 51.3 cm d. 43.3 cm

Explanation:

Step1: Recall the formula for circumference

$C = 2\pi r$ or $C=\pi d$, where $d$ is the diameter. Here the diameter $d = 13.8\times2=27.6$ cm.

Step2: Calculate the circumference

Using $C=\pi d$, and taking $\pi\approx 3.14$, we have $C\approx3.14\times27.6 = 86.664\approx86.7$ cm.

Answer:

B. 86.7 cm