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2 năm trước
Cho ABC vuông tại A có ( AB<AC ), tia phân giác cắt AC tại M, từ M vẽ MH vuông góc với BC tại H. a. Cm: ABM =HBM b. Gọi N là giao điểm của MH và BA. Cm NBM =CBM c. Gọi K là giao điểm của BH và NC. Cm KC = KN
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