Asked by Kathy

The arc length of a circle created by an angle of pi/3 radians is 2.5 cm. The radius of the circle is approx...

a. o.419 cm
b. 2.387 cm
c. 1.783 cm
d. 0.581 cm

Please explain how you got the answer. Thanks! :)
Answered by Ms. Sue
Kathy/Julie -- please use the same screen name for your posts.

Answered by Reiny
arc = rØ , where r is the radius and Ø is the central angle.

2.5 = r(π/3)
r = 7.5/π or appr. 2.387