SOLUTION: How do you find the circumfrence of a circle when you only know the arc length?

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Question 330636: How do you find the circumfrence of a circle when you only know the arc length?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
You mean you know the arc length and the angle corresponding to the arc length.
If AL is arc length, C is circumference, theta is the angle in radians, then
AL%2Ftheta=C%2F%282%2Api%29
C=%282%2Api%2AAL%29%2Ftheta
Since the circumference is the arc length when the corresponding angle is 2%2Api radians.
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If the angle is in degrees, then,
AL%2Ftheta=C%2F360
C=%28360%2AAL%29%2Ftheta