Mathematics, 24.07.2021 02:20, sandygarcia65

Cho tam giác ABC vuông tại A (AB < AC) đường cao AH a) Chứng minh HBA đồng dạng ABC và AB2 = BH. BC b) Chứng minh HBA đồng dạng HAC và HA2 = HB. HC c) Vẽ HD vuông góc AC tại D. Gọi M là trung điểm AB. Đường thẳng CM cắt AH và HD lần lượt tại I và K. Chứng minh KD = KH và 3 điểm B; I; D th

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Cho tam giác ABC vuông tại A (AB < AC) đường cao AH a) Chứng minh HBA đồng dạng ABC và AB2 = BH...

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