The circumference of a circle is 60π cm. What is the length of an arc of 140°?

Question

mathmale · Answer

Welcome to OpenStudy, pattie!

to solve this problem, you'll need to know (and know how to use) two different formulas:

1) that for the circumference of a circle (when the radius of the circle is given), and 

2) that for arc length (when the central angle, theta, and the radius are given)

mathmale · Answer

Mind typing in those two formulas here and now?

goformit100 · Answer

Welcome to Open Study

mathmale · Answer

Pattie:  Perhaps now is the time to look up "circumference of a circle" on the Internet, or in your online study materials, or wherever.  Also, "arc length."  You'll definitely need these formulas later on.