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khoaphamkun
2 năm trước
Trên Ox lấy OC = 5cm, OB = 3cm a, Tính AB b, Trên tia Ox lấy OC = 5cm. Trong ba điểm A,B,C điểm nào nằm giữa? Tính BC,CA c, C là trung điểm đoạn nào? ( ko làm câu a, cũng được )
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