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 the 2nd page (front & back) of the 13.3 WS Packet on Radians.