Radian/degree conversions; coterminal angles; complements and supplements

Radian/Degree Conversion Problems

Easy
What is in Radians?
X _π_ = _π_
        180      90
First you would multiply acorss to get 2pi/ 180, then simplify be taking 2 out of both, to be left with π/90 

What is 18° in Radians?
18° X _π_ = _
π_
          180      10
Multiply acrosee to get 18π/180, then simplify by taking 18 out of both, so you would be left with π/10

What is 30° in Radians?


Medium
What is _5π_ in Degrees?
                    6      
_5π_ X  180  =   150°        
   6        
π
The π's would cancle out, then you would mulitply across to get 900/6. Then you divide both the bottom and top by 6. you are left with 150/1. So 150°.  
 
What is _2π_ in Degrees?
                 10      
_2π_ X  180  = 36°           
   10      
π
The π's would cancel out, then you would mulitply across to get 360/10. Then you divide both the bottom and top by 10. you are left with 36/1. So 36°

What is _5π_ in Degrees?
                2      


Hard
What is 650°
in Radains?
650° _π_ =
_π_
          50      13 
Multiply acrose to get 650π/50, then simplify by taking 50 out of both the top and the bottom. So then you would be left with π/13

What is _17π_ in Degrees?
                  2    
_17π_ X  180  = 1530°           
   2            
π
The π's would cancel out, then you would mulitply across to get 3060/2. Then you divide both the bottom and top by 2. you are left with 1530/1. So 1530
°

What is 152° in Radians?


Real life example: 
Zac Efron has a photo shoot. He is at the mall now, and the photo studio is 5 blocks away. He must turn 35 degrees left when he leaves the building. How many radians must he turn?