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Mathematics, 23.07.2021 17:50 eysahvdtuj

Cho tam giác ABC vuông tại A. vẽ đường cao AH (H thuộc BC) a) CHứng minh tam giác BHA tương đươn với tam giác AHC
b) Chứng minh AB^2 = BC. BH
c) Tia phân giác của góc HAC cắt BC tại D. Qua D kẻ đường thẳng vuông góc với AD. Đường thẳng này cắt AB ở E. Chứng minh AB = BE

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Cho tam giác ABC vuông tại A. vẽ đường cao AH (H thuộc BC) a) CHứng minh tam giác BHA tương đươn vớ...
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