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Mathematics, 17.06.2021 16:20 katefuly
Cho tam giác ABC vuông tại A, có BD là phân giác của . Trên cạnh BC lấy điểm M sao cho BA = BM. a. Tính độ dài đoạn BC. Biết AB = 6cm, AC = 8cm. b. Chứng minh \Delta ABD = \Delta DMB. Từ đó suy ra MD \bot BC c. Đường thẳng MD cắt AB tại F. Gọi H là trung điểm của FC. Chúng minh rằng ba điểm D, B, H thẳng hàng. d. Giả sử \widehat {ACB} = {30^0}. Chứng minh rằng D là trọng tâm tam giác BFC
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Cho tam giác ABC vuông tại A, có BD là phân giác của . Trên cạnh BC lấy điểm M sao cho BA = BM. a. T...
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