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pi/4=180/4=45
7pi/6=(7 x 180)/6=7 x 30=210
5pi/2=(5x180)/2=450
-3pi/2=(-3 x180)/2=-270
3pi/12=(3 x 180)/12=45
-9pi/5=(-9 x 180)/5= -324
100pi/3=(100 x 180)/3= 6000
-20pi/3= (-20 x 180)/3= -1200
245pi/9=(245 x 180 )/9= 4800

pi = 180 grade

a) pi/4= 180/4=45 grade

b) 7pi/6= 7×180/6= 7×30= 210 grade

c) 5pi/2= 5×90=450 grade

d) -3pi/2=-3×90= -270 grade

e) 7pi/12 = 7×15= 105 grade

f) -9pi/5= -9×36= -324 grade

g) 100pi/3= 100×60= 6000 grade

h) -20pi/3 = -20×60=-1200 grade

i) 245pi/9 = 245 × 20 = 4900 grade