相等
∵∠AOB=∠COD=90º,∠AOD=∠AOD
∴∠AOB-∠AOD=∠COD-∠AOD
∴∠AOC=∠BOD
互补
∵∠BOC=∠AOB+∠AOC
∴∠BOC+∠AOD=∠AOB+∠AOC+∠AOD
=∠AOB+∠COD
=180º
∴∠BOC和∠AOD互补
相等
∵∠AOB=∠COD=90º,∠AOD=∠AOD
∴∠AOB-∠AOD=∠COD-∠AOD
∴∠AOC=∠BOD
互补
∵∠BOC=∠AOB+∠AOC
∴∠BOC+∠AOD=∠AOB+∠AOC+∠AOD
=∠AOB+∠COD
=180º
∴∠BOC和∠AOD互补