应该是∠AEB=2∠CBE
如图,过E作EF∥BC
E为中点,则F也为中点
AD⊥AB,则EF⊥AB,则EF为AB中垂线
∴∠AEF=∠BEF,则∠AEB=∠AEF+∠BEF=2∠BEF
又EF∥BC,∴∠BEF=∠CBE
∴∠AEB=2∠BEF=2∠CBE
应该是∠AEB=2∠CBE
如图,过E作EF∥BC
E为中点,则F也为中点
AD⊥AB,则EF⊥AB,则EF为AB中垂线
∴∠AEF=∠BEF,则∠AEB=∠AEF+∠BEF=2∠BEF
又EF∥BC,∴∠BEF=∠CBE
∴∠AEB=2∠BEF=2∠CBE