Question

look at attachment

Answer 1

you need to change the angle 60 degree to radian, then the formula to find the length of the arc is s = r\theta, where s is the arc, r is the radius of the circle and \theta is the angle measured in radian

Answer 2

60 degree is equal to pi/3 radian, so the arc length is 2pi

Answer 3

well the equation for arclength is arclength = radius * angle where angle hs to b in radians. so 60 degrees in radisans is pi/3
so in your case it is ...
6cm * (pi/3) = arclength