esoterick esoterick

16-05-2024
Mathematics

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1. Дан треутольник АВС с вершинами А (11: - 2: - 9). В (2:6: - 4). С (8: - 6. - 8). а) Найти координаты середины отрезка ВС.
б) Найти длину вектора ВС в) Докажите перпендикулярность векторов АВ и АС.

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