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 ( 180 degrees = pi radians).

We also used the formula s = r*theta (radian measure only) to get the arc length of any sized circle given its radius and radian measure.

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 both sides of the attached worksheet: Radian Angle Measurement Homework