,∠BOE比∠COE的3倍小10°∠BOE=90°所以 ∠COE=100/3因为 ,∠AOE=∠COD ∠AOE=∠AOD+∠DOE ∠COD =∠COE+∠DOE 所以∠AOD=∠COE=100/3又因为∠OD平分∠AOB 所以∠AOB=2∠AOD=200/3∠AOC=∠AOB+∠BOE+∠COE=200/3+90...