OE平分∠BOD ∠
∠BOD=2∠BOE
∠AOD:∠BOE=4:1
∠AOD:∠BOD=4:2=2:1
∠AOD+∠BOD=180°
∠AOD=120° ∠BOD=60°
∠BOE=∠DOE=30°
∠AOC=∠BOD=60° ∠AOD=∠BOC=120°
OF平分∠COE
∠COF=∠BOF=120°/2=60°
∠AOF=∠AOC+∠COF=60°+60°=120°
OE平分∠BOD ∠
∠BOD=2∠BOE
∠AOD:∠BOE=4:1
∠AOD:∠BOD=4:2=2:1
∠AOD+∠BOD=180°
∠AOD=120° ∠BOD=60°
∠BOE=∠DOE=30°
∠AOC=∠BOD=60° ∠AOD=∠BOC=120°
OF平分∠COE
∠COF=∠BOF=120°/2=60°
∠AOF=∠AOC+∠COF=60°+60°=120°