Chọn phát biểu sai A. Đường kính đi qua trung điểm của một dây thì vuông góc với dây ấy B. Đường kính vuông góc một dây thì đi qua trung điểm của dây ấy C. Đường kính vuông góc một dây thì hai mút đối xứng đi qua đường kính ấy D. Đường kính đi qua trung điểm của một dây ( khác đường kính) thì vuông góc với dây ấy

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