OC是<AOC.<COB的公共邊,且OA,OB在OC的兩旁,<COB=2<AOC,OD平分<AOB,<COD=29度,求<AOB

熱心網(wǎng)友

設(shè)角AOC為x，則角BOC為2x角AOB為3xOD平分