unghiurile complementare =90grade
a+b=90
a-b=24grade 20min 36sec
adunam aceste doua ecuatii:
a+a+b-b=90grade+24grade20min36sec
2a=114grade 20 min 36sec
a=57grade 10min 18 sec
b=90 grade-57 grade10min18sec
b=89grade59min60sec -57grade 10min18sec
b=32grade49min42sec