Adan Scribe Post: Day 13- Feb. 22 2011

Today Jojo sarted teaching section 1.2 which is about radian measure. A radian is the measure of and arc's length. He talked about how in the radian system of angular measurement, the measure of one revolution is 2pi, half a circle is pi, each right angle is pi/2 and so on. He also talked about the most common measurements and their degree. Here are some of those:

pi/4 = 45 degrees

pi/3 = 60 degrees

pi/6 = 30 degrees

2pi/3 = 120 degrees

and so on.