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canngocmai01
2 năm trước
Cho tam giác ABC vuông tại A. Kẻ AH vuông góc với BC tại H. Trên đường vuông góc với BC tại B lấy điểm D sao cho D và A nằm trên hai nửa mặt phẳng đối nhau có bờ là BC và AH = BD. a. Chứng minh tam giác AHB = tam giác BDH; b. Chứng minh AB//HD; c. Gọi O là giao điểm của AD và BC. Chứng minh O là trung điểm của BH. d. Tính góc ACB biết góc BDH = 35°. Giups mk câu c và d nhé
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