因为A,O,B在同一条直线上,所以 ∠AOC + ∠BOC = ∠AOB =180°即 ∠AOC =180° - ∠BOC 由 ∠AOC=1/2∠BOC+30°,可得180° - ∠BOC = 1/2∠BOC + 30°所以,∠BOC = 100°OE平分∠BOC所以,∠BOE = 1/2∠BOC = 50°
很简单啊 要多画图啊老大!顺便问一下你几年级啊?