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nhandz11
2 năm trước
Cho 3 điểm M N O biết om = 2,8 cm ON=3,2 ;MN=5,5 cm. Chứng tỏ rằng a) Trong 3 điểm M, N, O không có hai nào nằm giữa hai điểm còn lại b) Ba điểm M,N,O không thẳng hàng
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