1.
a)
/
/
/_________ 60grade.
b)
\
\
\
\______________ 130grade
2.
a)daca te referi la 7200 grade , 7200grade=7200*60=432000min
daca te referi la 7200'', 7200''=7200:60=120min
b) 54grade 12'=54*60+12'=3240+12=3252'
3.
a) 2400'=2400:6=400grade
b)3642'=3600'+42'=3600:60+42'=60grade 42'