Question

已知OE平分∠AOB,C为∠AOE内一点,∠BOC=3∠AOC,若∠=114°,求∠COE的度数

Answer 1

oE平分∠AOB

∠BOE=57°

∠BOC=3∠AOC

∠BOC+∠AOC=114°

∠BOC=85.5°

∠COE=∠BOC-BOE

∠COE=28.5°