вектор АВ -1+7;2-6=6;-4
длина |АВ| = √ax2 + ay2 = √62 + (-4)2 = √36 + 16 = √52 = 2√13 ≈ 7.2
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вектор АВ -1+7;2-6=6;-4
длина |АВ| = √ax2 + ay2 = √62 + (-4)2 = √36 + 16 = √52 = 2√13 ≈ 7.2