摘要:12.由图填空:⑴∠AOC= + ; ⑵∠AOC-∠AOB= ; ⑶∠COD=∠AOD- ; ⑷∠BOC= -∠COD; ⑸∠AOB+∠COD= -
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由图填空:
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⑴∠AOC=_________+___________;
⑵∠AOC-∠AOB=____;
⑶∠COD=∠AOD-___;
⑷∠BOC=____________-∠COD;
⑸∠AOB+∠COD=______________-______________
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