University of Wisconsin H. Jerome Keisler's "Elementary Calculus, Chapter 6: Applications of the Integral, Section 6.3: Length of a Curve"

Read Section 6.3 (pages 319 through 325). This reading discusses how to calculate the length of a curve, also known as arc length. This includes calculating arc length for parametrically-defined curves.

Click https://s3.amazonaws.com/saylordotorg-resources/wwwresources/site/wp-content/uploads/2012/09/MA102-Kiesler-Chapter-6.pdf link to open resource.