Question

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

Answer 1

2.2 ft ( to 1 dec. place )

Explanation:

The arc length is calculated as

arc = circumference × fraction of circle

= 2πr ×
`(18)/(360)`

= 2π × 7 ×
`(1)/(20)`

= 14π ×
`(1)/(20)`

=
`(14\pi )/(20)` ≈ 2.2 ft