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Chỉ cần vẽ giúp mình hình thôi không cần làm đâu Cho nửa đường tròn (O;R) đường kính AB . Kẻ tiếp tuyến Ax với nửa đường tròn đó tại A ( Tia Ax thuộc nửa mặt phẳng bờ AB chứa nửa đường tròn ) Từ điểm M bất kì trên tia Ax kẻ tiếp tuyến thứ 2 MC với nửa đường tròn (O) (C là tiếp điểm ) AC cắt OM tại E . MB cắt nửa đường tròn (O) tại B
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