题目内容

按图填空:
(1)∠AOB+∠BOC=______;
(2)∠AOC+∠COD=______;
(3)∠BOD-∠COD=______;
(4)∠AOD-∠BOD=______;
(5)∠AOD=∠AOB+∠BOC+______=∠AOB+______=∠AOC+______;
(6)∠BOC=∠AOD-∠AOB-______=∠AOC-______=∠BOD-______?
(1)∠AOB+∠BOC=∠AOC;
(2)∠AOC+∠COD=∠AOD;
(3)∠BOD-∠COD=∠BOC;
(4)∠AOD-∠BOD=∠AOB;
(5)∠AOD=∠AOB+∠BOC+∠COD=∠AOB+∠BOD=∠AOC+∠COD;
(6)∠BOC=∠AOD-∠AOB-∠COD=∠AOC-∠AOB=∠BOD-∠COD.
故答案为:(1)∠AOC;(2)∠AOD;(3)∠BOC;(4)∠AOB;(5)∠COD,∠BOD,∠COD;(6)∠COD,∠AOB,∠COD.
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