New posts in Arc Length

Understanding the formula for curvature

Graphs for which a calculus student can reasonably compute the arclength

Is the arc length always irrational between two rational points?

Integral inequality of length of curve

Given a circle of radius r, and two points ('X' and 'Z') on that circle, can some circumcircular arc "XYZ" be constructed of length r?

Is the arclength of $x\sin(\pi/x)$ in the interval $(0, 1)$ finite?

Is this "derivation" of the path length formula actually correct?