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tuanglory77
2 năm trước
Cho ∆ABC có AB = 6cm; AC = 8cm; BC = 10cm. ​a/ Chứng minh ∆ABC vuông. ​b/ Kẻ phân giác BD; CE ( D thuộc AC; E thuộc AB). BD và CE cắt nhau tại I. Tính số đo
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