∵OE平分∠BOD，∴∠DOE=∠BOE.∵∠AOD:∠BOE=7:1，∴∠AOD=7∠BOE。又∵∠AOD+∠DOE+∠BOE=180°，∴7∠BOE+∠BOE+∠BOE=180°，∴∠DOE=∠BOE=20°。∴∠COE=180°-20°=160°。∵OF平分∠COE，∴∠EOF=1/2∠COE=80°。∴∠BOF=80°-20°=60°∴∠AOF=180°-∠BOF=120°
