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How to find length of arc
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Measured in degrees. If the angle of your arc is measured in degrees then use this formula to calculate the length of the arc: Arc length (A) = (Θ ÷ 360) x (2 x π x r) or. A = (Θ ÷ 360) x (D x π)
A circle is 360° all around so if you divide the arc's degree measured by 360° then you will find the fraction of the circle's circumference that the arc is made up of. Then, you multiply the length all around the circle (the circumference) by the fraction, you will get the length along the arc.
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