Mathematics, 29.07.2021 14:00 aderahd7352

Cho 4 điểm A, B,C, D trong đó không có 3 điểm nào thẳng hàng, bất kì 2 điểm nào cũng có khoảng cách lớn hơn 10. Chứng minh rằng tồn tại hai điểm trong 4 điểm đã cho có khoảng cách lớn hơn 14.

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Cho 4 điểm A, B,C, D trong đó không có 3 điểm nào thẳng hàng, bất kì 2 điểm nào cũng có khoảng cách...