Răspuns :
a ) 90° - 25° = 65°
b ) 90° - 75° = 15°
c ) 90° - 40°25' = 89°60' - 40°25' = 49°35'
d ) 90° - 54°10'27'' = 89°59'60'' - 54°10'27'' = 35°49'33''
Răspuns:
a)25°
90°-25°=65°
b)75°
90°-75°=15°
c)40°25'
89°60'-40°25'=49°35'
d)54°10'27''
88°60'60''-54°10'27'=35°49'33''