Question

如图,AB⊥CD垂足为O且∠BOE:∠COE=2:1求∠COF的度数

Answer 1

∵∠BOE:∠COE=2:1

∠BOE+∠COE=90°

∴∠BOE=60°

∠AOF=60°

∴∠COF=∠COA＋∠AOF＝90＋60＝150°