doua unghiuri complementare au 90grade
iar 2 unghiuri suplementare au 180grade
a)15grade 2 min
90grade-15g2m=
89grade60min-15grade2min=
74g58m
b)66 12 25
90-66 12 25=
89 59 60-66 12 25=
23 47 35
2)a)56 30
180-56 30=
179 60-56 30=
123 30
b)100 14 30
180-100 14 30=
179 59 60-100 14 30=
79grade 45min 30sec