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Nguyenphuong2007
2 năm trước
Cho tam giác nhọn ABC có AB > AC, ba đường cao BD, CE và AF cắt nhau tại H. Lấy M trên cạnh AB sao cho AM = AC. Gọi N là hình chiếu của M trên AC; K là giao điểm của MN và CE. a, Chứng minh hai góc KAH và MCB bằng nhau b, Chứng minh AB + CE > AC + BD CÁC BẠN GIÚP MÌNH VỚI Ạ CẢM ƠN CÁC BẠN NHIỀU LÀM CỤ THỂ HỘ MÌNH NHA ĐỪNG LÀM VẮN TẮT
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