Then we looked at another way to measure an angle instead of degrees. We found that we could describe an angle using the ratio of the arc length to the circle's radius (called a radian). We converted between radian measure and degree measurements (360 degrees = 2 pi radians). We used this fact to create a proportion so that we could determine either the radian measure given the angle in degrees or vice versa.
Use the links below for help/review
https://www.youtube.com/watch?v=UTClXRvws8o
http://www.mathsisfun.com/geometry/radians.html
https://www.khanacademy.org/math/trigonometry/unit-circle-trig-func/radians_tutorial/v/we-converting-radians-to-degrees
HW: Complete WS 13.3 Reteaching the front side (1 - 12) and convert your degree measures on your unit circle (half-sheet) to radians. Quiz 13.1 - 13.2 is tomorrow, May 4th.