Mathematics, 07.07.2021 08:40, rebekahlm

Cho ∆ABC vuông tại A AH vuông góc với BC tại H .HD vuông góc với AB ,HE vuông góc với AC .CM AH mũ 3 =BC×BD×CE

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Cho ∆ABC vuông tại A AH vuông góc với BC tại H .HD vuông góc với AB ,HE vuông góc với AC .CM AH mũ 3...