Contact us
Choose a category below so we can get back to you as quickly as possible.
∵OE平分∠AOB,OF平分∠BOC,∴∠BOF=12∠AOB=12×90°=45°,∠COF=∠BOF=12∠BOC,∵∠BOF=∠EOF-∠BOE=60°-45°=15°,∴∠BOC=2∠BOF=30°;∠AOC=∠BOC+∠AOB=30°+90°=120°.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.