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Calculati
a)180grade-28grade43minute52secunde
b)100grade31minute42secunde-80grade32minute43secunde


Răspuns :

a) 179° 59' 60"-28° 43' 52"=151° 16' 8"
b) 100° 31' 42"-80° 32' 43=99° 91' 42"-80° 32' 43"=99° 90' 102"-80° 32' 43"=19° 58' 59"