On 2021-02-21 2:40 PM (-4), Bald Eagle wrote:
> 
> When I was going through all of the Bezier spline stuff, I recall coming across
> a way to calculate the arc length of a curve....  but that will have to wait
> until I get a second wind.

For a circular arc, by definition it's

   arc_length = angle_in_radians * radius_of_curvature


to me, but can probably be explained to a 5 year old on Numberphile.

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