December 18, 2014
Obj. 3: To convert between degrees and radians.
Convert the degrees to radians.
1. 45o
2. 270o
Convert the radians to degrees.
π
3.
6
4. 2.5 radians
December 18, 2014
Obj. *To learn the arc length formula for radian measure.
s
r
θ
Arc Length (Degree Measure):
s = πrθ
180
Arc Length (Radian Measure):
s = rθ
Example:
Find the length of the arc with central angle
π
4
and r = 10cm.
December 18, 2014