Răspuns :

1. AOC=AOB+BOC
AOC=80+120=200

2.AOB+BOC+COA=360
x+40+2x+50+6x=360
9x=360-40-50
9x=270
x=30
AOB=30+40=70
BOC=2*30+50
BOC=60+50
BOC=110
AOC=6*30
AOC=180

3. x+80+31+93+42+x+16=360
2x=262
x=131
AOF=131+16=147

4.AOD=360-90-60-50
AOD=160

Toate sunt exprimate in grade!! Sper ca nu am uitat nimic! Mult succes!!