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A circle sector OAB has angle 0.8 radians. What is arc length AB?

 

 Jun 21, 2020
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A circle is 2π radians.

 

So the angle measure is 0.8/2π = 0.4/π part of the circle.

 

The circle has circumference 2π20 = 40π

 

So thus...

 

We multiply 0.4/π by 40π to get the length AB, so thus (0.4 * 40π)/(π) = 16π/π = 16

 

If you don't understand anything, feel free to ask!

 Jun 22, 2020

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