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ngochanphan.1101
2 năm trước
Co ΔABC cân tại A. Kẻ AH ⊥ BC (H ∈ BC). Biết AB=9cm, BC=16cm. a) Tính AH và BH b) Cho G là trọng tâm của ΔABC. CM: 3 điểm A;G;H thẳng hàng - ko cần vẽ hình nha
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