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Mathematics, 09.07.2021 01:40 EternalRose1121

Cho ∆ABC vuông tại A, AH vuông góc với BC tại H . Gọi D, E lần lượt là hình chiếu của H trên AB, AC Chứng minh AH mũ 3=BC×BD×CE

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Cho ∆ABC vuông tại A, AH vuông góc với BC tại H . Gọi D, E lần lượt là hình chiếu của H trên AB, AC...
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