Test 6 #20 from the no calculator section

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The circle, you’re told, has a radius of 1, so that means its circumference is 2\pi (1) =2\pi. The arc between A and B has a length of \dfrac{\pi}{3}. How much of the circumference is that?

\dfrac{\left(\dfrac{\pi}{3}\right)}{2\pi}=\dfrac{\pi}{3}\times\dfrac{1}{2\pi}=\dfrac{1}{6}

 

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