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phuho133
2 năm trước
Cho tam giác ABC vuông tại A có AB=6cm ,BC=10cm .Kẻ đường cao AH H thuộc BC .TRÊN CẠNH HC lấy điểm D sao cho HD=HB a, Tính độ dài AC b, CM :tam giác BAD cân c, Từ C kể CE vuông góc với đường AD, E thuộc AD ,đường thẳng CE cắt AH tại M . Chứng minh CB là tia phân giác của góc ACM
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