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Mathematics, 26.12.2021 14:00 idontknow11223344

Cho tam giác ABC vuông cân tại A, đường cao AH. Từ điểm M bất kì trên cạnh BC (M không trùng với B và C) kẻ các đường thẳng song song với AC và AB cắt AB ở D và cắt AC ở E a. Chứng minh rằng ADME là hình chữ nhật b. Giả sử AD = 6cm, AE = 8cm. Tính độ dài AM. c. Chứng minh : góc DHE= 45 độ

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Cho tam giác ABC vuông cân tại A, đường cao AH. Từ điểm M bất kì trên cạnh BC (M không trùng với B v...
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