Răspuns:
Explicație pas cu pas:
a) 25° 43' 25" + 10° 40' 45" = 35°83'70'' = 35°84'10'' = 36°24'10''
b) 15° 35' 50" + 20° 55' 15" = 35°90'65'' = 35°91'5'' = 36°31'5''
c) 71° 51' 43" + 100° 59' 57" = 171°110'100'' = 171°111'40'' = 172°51'40''
d) 13° 25' 45" + 10° 50' 58" = 23°75'103'' = 23°76'43'' = 24°16'43''