Mathematics, 08.10.2021 14:00 rockyroad19

Cho tam giác ABCD. Chứng minh rằng nếu vectơ AB = vectơ DC thì vectơ AD = vectơ BC

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Cho tam giác ABCD. Chứng minh rằng nếu vectơ AB = vectơ DC thì vectơ AD = vectơ BC...

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