Khan Academy
Khan Academy: Calculus: 2011 Calculus Bc Free Response #3A
Video shows how to use integrals to write a formula for the perimeter of an area bounded on one side by a function. Includes showing how to derive the arc length formula. [5:41]
Khan Academy
Khan Academy: Calculus: 2011 Calculus Bc Free Response #1D
Video shows how to derive the arc length formula and how to use it to determine the total distance a particle traveled during a given time interval. [8:34]
Khan Academy
Khan Academy: Calculus Bc Sample Questions: 2011 Calculus Bc Free Response #1 D
Arc length for a curve.
Khan Academy
Khan Academy: Relating Angular and Regular Motion Variables
In this video David shows how to relate the angular displacement to the arc length, angular velocity to the speed, and angular acceleration to the tangential acceleration. [14:36]
Study Pug
Study Pug: Angles in a Circle
Video shows how to find an angle inscribed in a circle. [1:58]