The math word "arc length" is referenced in the pages listed below.
Definition of arc length and formula to calculate it from the radius and central angle of the arc.
We can approximate the length of a curve by using straight line segments and can use the distance formula to find the length of each segment. Then, as the segment size shrinks to zero, we can use a definite integral to find the length of the arc of the curve. Interactive calculus applet.
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