Răspuns :
1. 123 grade 17’+ x = 180 grade - unghiuri suplimentare
2. x= 180 grade - 123 grade 17’= 179 grade 60’ -123 grade 17’= 57 grade 43’
R/s: x= 57 grade 43’
’- sunt minute
2. x= 180 grade - 123 grade 17’= 179 grade 60’ -123 grade 17’= 57 grade 43’
R/s: x= 57 grade 43’
’- sunt minute