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lano137001
2 năm trước
Tam giác ABC có AB = 9cm, AC = 6cm, BC = 10cm. Tia phân giác góc BAC cắt cạnh BC tại D a) Tính DB, DC b) Tính tỉ số diện tích tam giác ABD và tam giác ACD c) Vẽ tia phân giác góc ngoài của góc BAC cắt BC tại E. Tính DE Vẽ hình hộ mik vs nha. Mik cần câu a b là đc
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