∵∠AOE=∠FOD=90°，∴∠AOF+∠EOF=90°，∠BOD+∠DOE=90°，∠DOE+∠EOF=90°，∵OB平分∠COD，∴∠BOD=∠BOC，∴∠DOE互余的是∠EOF、∠BOD、∠BOC；∵∠AOF+∠BOF=180°，∠DOE+∠BOF=180°，∴与∠DOE互补的角是∠BOF、∠EOC．
