complementul:90 grade - 30 grade=60 grade
90 grade - 72 grade=18 grade
90 grade -120 grade= -30 grade
90 grade - 45 grade= 45 grade
90 grade - 144grade= -54 grade
90 grade - 100 grade= -10 grade
suplement: 180 grade - 30 grade =150 grade
180 grade - 72 grade =108 grade
180 grade - 120 grade = 60 grade
180 grade - 45 grade = 135 grade
180 grade -144 grade = 36 grade
180 grade - 100 grade = 80 grade
