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Faceti 2 exercitii cu calcularea unghiului (in grade, minute, secunde) HELP ME!!!

Coronita


Răspuns :

40 15' 10'' + 15 30' 30''=55 45' 40 ''
90 - 20 15' 30''= 89 59' 60''-20 15' 30''= 69 44'30''
40 31' 12" + 13 12' 33" = 53 42' 45"
71 22' 18" + 77 1' 15" = 148 23' 33"