Geometry arc length

[rachelmaddie]

I want to check my work for #4 finding the arc length.

 

[lev888]

Looks right to me.

 

[wolf]

I agree.

 

[Harry_the_cat]

Your answer is correct. But your justification is a little incorrect. In the formula you quote for arc length, the angle theta is measured in degrees, so you should just say that theta = 60^o rather than theta radians = 60^o.