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如图,OA、OB、OC都是圆O的半径,∠AOB=2∠BOC.求证:∠ACB=2∠BAC.
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教案备课库《2017——2018上学年九年级数学学科导学案(34)27.1.3圆的认识——圆周角(1)》真题及答案
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