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ngotruonghuycorn
2 năm trước
Cho tam giác ABC vuông tại A (AB < AC) có AH là đường cao (H thuộc BC). Gọi I là trung điểm AH, Qua C vẽ đường thẳng vuông góc với BC cắt BI tại K. Chứng minh tam giác AKC cân.
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