理由:(壹)∵∠BOC=140°∴∠ AOC=40°
∵∠DOE=150°∴∠COE=30°
∵∠AOE= ∠AOC+∠COE ∴∠AOE=40°+30°=70°
(二)∵∠BOC=140°∴∠AOC=40°
∵∠AOE=∠AOC-∠COE
∴∠AOE=40°-30°=10°