Question

1. radius = 7 ft, central angle = 18° Find arc length.

Answer 1

Answer:

2.2 ft ( to 1 dec. place )

Step-by-step explanation:

The arc length is calculated as

arc = circumference × fraction of circle

     = 2πr × $\frac{18}{360}$

     = 2π × 7 × $\frac{1}{20}$

     = 14π × $\frac{1}{20}$

     = $\frac{14\pi }{20}$ ≈ 2.2 ft