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memetea1105
2 năm trước
Bài 20: Cho tam giác ABC vuông ở A, đường cao AH.Gọi D là hình chiếu của H trên AC, E là hình chiếu của H trên AB. a) Chứng minh tứ giác ADHE là hinh chữ nhật b) Chứng minh tam giác ADE đồng dang với tam giác ABC. Giải bài 20 giúp mình ạ
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