(1)∠AOD=∠AOB+∠BOD=70°+50°=120°∠EOF=∠COE+∠COF=∠AOC/2+∠BOC/2=∠AOC/2+(∠AOB-∠AOC)/2=50°/2+(70°-50°)=25°+10°=35°
(2)∠FOG=∠BOF+∠BOG=∠BOC/2+∠BOD/2=20°/2+50°/2=35°因为:∠EOF=∠FOG所以:OF是∠EOG的平分线
(1)∠AOD=∠AOB+∠BOD=70°+50°=120°∠EOF=∠COE+∠COF=∠AOC/2+∠BOC/2=∠AOC/2+(∠AOB-∠AOC)/2=50°/2+(70°-50°)=25°+10°=35°
(2)∠FOG=∠BOF+∠BOG=∠BOC/2+∠BOD/2=20°/2+50°/2=35°因为:∠EOF=∠FOG所以:OF是∠EOG的平分线