Question

What is the arc length when θ = 2 pi over 5 and the radius is 6 cm?

Answer 1

assuming the angle is in radians.... you should say so. 

r =6cm, diameter = 12 cm and circum = 12π 
arc length = circum(angle/2π) 
arc length = 12π(2π/5)(1/2π) = 12π/5 = 7.54

Hope I helped :)

Answer 2

Answer:

Arc length = 7.53 cm  

Step-by-step explanation:

We have given that : Radius = 6 cm

and given Angle = $\theta=\frac{2\pi }{5}$

We have to find: The Arc length(A)

Solution: The formula of arc length is given by,

                Arc length(A) = radius × angle(in radian)

                      $A= 6\times\frac{2\pi }{5}$

                     $A=\frac{12\pi }{5}$

                           A= 7.53 cm