Question

A circle with circumference 20 has an arc with a 72 degrees central angle. What is the length of the arc?

Answer 1

Step-by-step explanation:

Length of arc

$= \frac{ \theta}{360 \degree} \times c \\ \\ = \frac{72 \degree}{360 \degree} \times 20\\ \\ = \frac{1}{5} \times 20 \\ \\ = 4 \: units$