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nguyenly7321
2 năm trước
1. Trên tia Ox lấy hai điểm A,B sao cho OA=3cm; OB=6cm a. trong 3 điểm O,A,B điểm nào nằm giữa hai điểm còn lại. vì sao? b. tính AB c. Điểm A có phải là trung điểm của đoạn thẳng OB ko? vì sao? d. Gọi I là trung điểm của đoạn thẳng OA,K là trung điểm của đoạn thẳng AB. Tính IK GIẢI GIÚP MK NHA. MK CẦN GẤP
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