SOLUTION: The area of the circle is 81pi sq. cm. Find the arc length of this circle that subtends a central angle of pi/3.

Question 1014342: The area of the circle is 81pi sq. cm. Find the arc length of this circle that subtends a central angle of pi/3.
Answer by ikleyn(52818) (Show Source): You can put this solution on YOUR website!
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The area of the circle is 81pi sq. cm. Find the arc length of this circle that subtends a central angle of pi/3.
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1. To find the radius, use this equation

   S = ,   or
   
    = .

   Then you immediately get r = 9 m.


2. The arc length is 

   L =  =  =  =  m.

   Calculate yourself 3*3.14.

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