BO垂照垂直AO,OD平分角BOC,角AOC等于5/2角BOD,求角COD

∵BO⊥AO∴∠AOB=90°∴∠BOA(大角）=360°-90°=270°∵OD平分∠BOC∴∠BOC=2∠BOD∵∠AOC=5/2∠BOD∴∠AOC=5/4∠BOC∵∠BOA(大角）=360°-90°=270°∵∠BOA=∠AOC+∠BOC即27...