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phamthithuan20902
2 năm trước
trên tia Ox,,vẽ hai điểm A,B sao cho OA =2cm,OB =4cm. a)điểm A có nằm giữa hai điểm O và B ko? b) so sánh OA và AB. c) điểm A có là trung điểm của đoạn thẳng OB ko?vì sao?
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