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nguyenvanty70
2 năm trước
cho tam giác abc cân tại a.Lấy điểm D ( D thuộc ac), điểm i ( i thuộc ab). Sao cho AD=AI a) tính số đo góc abd và aci b) gọi h là giao điểm của bd và ci tam giác hbc là tam giác gì? vì sao
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