Mathematics, 24.07.2021 06:00 kathrynaveda

cho tam giác ABC vuông tại A ,AB< AC, phân giác BD ,DI vuông góc BC , DI cắt AB tại K a) chứng minh AI vuông góc BD b) chứng minh BD vuông góc CK

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cho tam giác ABC vuông tại A ,AB< AC, phân giác BD ,DI vuông góc BC , DI cắt AB tại K a) chứng mi...

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