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pronamtoan
2 năm trước
Cho tam giác ABC vuông tại A, AB=3cm, AC=4cm a)Tính độ dài đoạn thẳng BC b) Kẻ đường phân giác BD của tam giác ABC(D thuộc AC) kẻ DH vuông góc BC(H thuộc BC) Chứng minh tam giác ABD= tam giác HBD Các bạn giúp mình với ạ
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