Question

如图,∠AOC= ——+—— ∠BOC=∠BOD-∠___ =∠AOC-∠——

Answer 1

∠AOC=∠AOD+∠COD
∠BOC=∠BOD-∠COD =∠AOB-∠AOC

追问

我问的是
=∠AOC-∠——

追答

要么题目有条件 OC平分∠BOD,则=∠AOC-∠AOD
要么题目错误，改成=∠AOB-∠AOC

Answer 2

∠AOC=∠ AOD+∠DOC
∠BOC=∠BOD-∠COD =∠AOB-∠AOC

Answer 3

∠AOC= ∠AOD+∠COD ∠BOC=∠BOD-∠COD=∠AOC-∠AOD