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pnbvy142
1 năm trước
CHO ĐIỂM O thuộc đường thẳng xy.Trên tia Ox lấy điểm M, N sao cho OM=2cm , ON=7cm .Trê1 độ n tia Oy lấy điểm P sao cho OP=3cm a, tinh độ dài đoạn thẳng MN,NP b, chứng minh rằng M là chung điểm của đoạn thẳng NP c, gọi I là trung điểm của đoạn thẳng MN. Tính MI , OI các bạn giúp mìk nhé ^^
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