Radian Measure

Use this construction to investigate radian measure in a circle.
  1. Explore by choosing point C and moving it around the circle. Notice the relationship between s and the radius.
  2. Explore by choosing point B (but leaving C fixed) and changing the radius of the circle. What effect does it have on the radian measure?
  3. Click "Convert" to see how to convert the radian measure you are looking at to the more traditional degree measurements.