∵ ∠携型AOB=∠AOC+∠BOD-∠COD
∴渗隐碧∠COD=∠丛举AOC+∠BOD- ∠AOB
=55°+110°-145°
=20°
如图，∠AOB=145°，∠AOC=55°，∠BOD=110°，求∠COD的度数
∵ ∠携型AOB=∠AOC+∠BOD-∠COD
∴渗隐碧∠COD=∠丛举AOC+∠BOD- ∠AOB
=55°+110°-145°
=20°
∵ ∠携型AOB=∠AOC+∠BOD-∠COD
∴渗隐碧∠COD=∠丛举AOC+∠BOD- ∠AOB
=55°+110°-145°
=20°