Homework Help: Math

Posted by Kathy on Thursday, August 4, 2011 at 9:59pm.

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! :)

Math - Ms. Sue, Thursday, August 4, 2011 at 10:08pm
Kathy/Julie -- please use the same screen name for your posts.
Math - Reiny, Thursday, August 4, 2011 at 10:09pm
arc = rŲ , where r is the radius and Ų is the central angle.

2.5 = r(π/3)
r = 7.5/π or appr. 2.387

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