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alex2009gab
@alex2009gab
October 2023
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KLMN - паралелограм. Знайдіть координати точки N, якщо K(4; 1), L(7; 5), M(3; 2). Чи є KLMN прямокутником?
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jenomiz
KL = (7 - 4; 5 - 1) = (3; 4)
N = L + KL = (7; 5) + (3; 4) = (10; 9)
координати точки N (10; 9)
KL ⋅ KM = (3; 4) ⋅ (-1; 3) = 3*(-1) + 4*3 = -3 + 12 = 9
KLMN не є прямокутником.
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jenomiz
можно лучший ответ
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Answers & Comments
KL = (7 - 4; 5 - 1) = (3; 4)
N = L + KL = (7; 5) + (3; 4) = (10; 9)
координати точки N (10; 9)
KL ⋅ KM = (3; 4) ⋅ (-1; 3) = 3*(-1) + 4*3 = -3 + 12 = 9
KLMN не є прямокутником.