What is the length of the arc

Question

A circle has a radius of three and are going to circle has a central angle 20° what is the length of

Answer 1

arc length = radians times radius

convert 20 degrees to radians

2pi radians = 360 degrees

20 degrees = 20/360 x 2pi = 1/18 x 2pi = pi/9 radians

pi/9 x radius = pi/9 x 3 = pi/3 = arc length

Answer 2

(angle/360)* 2 * pi * R=

(20/360) * 2 * pi * 3 = pi * 120/360 = pi/3