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What is the arc length of an angle of 2π 3 radians formed on the unit circle? a) π 3 b) 2π 3 c) 4π 3 d) 5π 3

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We know that
in a unit circle the radius is 1
therefore
[Length of a circumference]= 2 * pi * r> 2 * pi

if 2pi radians have a length> 2 * pi in a unit of circle
2 rad / 3 radians> X.
X = 2pi / 3

the answer is 2pi / 3