Question

A circle has a radius of 5 meter. What is the length of the arc that is captured by a central angle that measures 120 degrees? Round your answer to the nearest tenth.
a) 3.33 meters
b) 31.42 meters
c) 10.47 meters
d) 2.09 meters

Answer 1

Well, the formula for the length of an arc is;
  n⁰     × 2πr
360
  Where; n⁰ is the angle
               π is pie, which is 22/7 or 3.143 approximately
                and r is the radius
  
  Anyway, according to the question;
n⁰ is 120⁰
and r is 5 meters. And as you know, the pie is 22/7. So that will be

120⁰/360 x 2 x 22/7 x 5
 And that will give you 10.47metres. Which is approximately 11 metres. Hope i helped, have a nice day 

Answer 2

I'd solved the question in attachment. Please watch out the pic..