Question

What is the arc length when the central angle is 120 degrees and the radius is 5m?

Answer 1

arc length ≈ 10.5 m

Explanation:

the arc length is calculated as

arc = circumference of circle × fraction of circle

= 2πr ×
`(120)/(360)` ( r is the radius )

= 2π × 5 ×
`(1)/(3)`

=
`(10\pi )/(3)`

≈ 10.5 m ( to the nearest tenth )