1)
a) C=180-35-75=70
b)B=180-40-65=65
c)A=180-25 33'- 81 27'=180-107=73
2)
m(b)=m(c)-48
m(a)=2m(c)-96
180= m(c)-48+2m(c)-96+m(c)
180=4m(c)-144
4m(c)=324
m(c)=81
m(b)=81-48=33
m(a)=2x81-96=66
3) a)
m(c)=180-42 10'-57 50'=180-100=80
b)
m(A)=20 20':2=10 10'
m(b)=180-20 20'-10 10'=180-30 30'=149 30'
c)
m(a)=180-37 41' 18"-68 32' 42"=180-105 74'=180-106 14'=73 46'