Respostas

2013-12-06T18:19:56-02:00
A) 180° ------------ PI rad.
      30° -----------    x


180°/30° = PI rad./ x
6 = PI rad./x
x = PI/6

b) 180° --------PI rad
     15° --------  x 

   180°/15° = PIrad/x
    12 = PI rad. /x
   x = PI rad. /12

c) 180° --------  PI rad
    120° -------  x
   
 180°/ 120° = PI rad / x
  3/2 = Pi rad / x
 x = Pi rad / 3/2
8 4 8