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Toán Lớp 9: Cho tam giác ABC có : BAC=90^o , Ah vuông góc BC , HB/HC=1/4 , AH=14cm cv ABC=?

Home/ Toán Lớp 9: Cho tam giác ABC có : BAC=90^o , Ah vuông góc BC , HB/HC=1/4 , AH=14cm cv ABC=?

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