Mathematics, 25.07.2021 19:40 makylahoyle
Tam giác ABC vuông ở C, phân giác AE, kẻ EK vuông góc với AB tại K, BD vuông góc với AE( D thuộc AE). Chứng minh: a) AC =AK b) AE vuông với CK c) EB>EC d)Ba đường thẳng AC, BD, KE cùng đi qua 1 điểm
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Tam giác ABC vuông ở C, phân giác AE, kẻ EK vuông góc với AB tại K, BD vuông góc với AE( D thuộc AE)...
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