Предмет: Геометрия, автор: kosuroaumi

5. Дано точки к (0; -2), М (2; 2). Точка В - середина відрізка КМ. Знайдіть координати точки, симетричноï точці В відносно початку координат.
А) (1;0) Б)(-1;1) В) (-1;0) Г) (-1;1).​

Ответы

Автор ответа: BohdanTimchenko
1

Відповідь:

А) (1;0)

Пояснення:

Для знаходження симетричної точки (А) відносно початку координат від точки В, ми можемо використовувати формулу для обчислення координат точки:

А(x, y) = (-x, -y)

Де (x, y) - координати початкової точки, а (-x, -y) - координати симетричної точки.

Спочатку знайдемо координати середини відрізка КМ, тобто точки В. Для цього можемо використовувати середню точку між координатами K(0, -2) та M(2, 2):

x_В = (x_K + x_M) / 2

x_В = (0 + 2) / 2

x_В = 2 / 2

x_В = 1

y_В = (y_K + y_M) / 2

y_В = (-2 + 2) / 2

y_В = 0 / 2

y_В = 0

Тепер, знаючи координати точки В (1, 0), ми можемо знайти координати точки А, яка симетрична до точки В відносно початку координат:

x_A = -x_В

x_A = -(1)

x_A = -1

y_A = -y_В

y_A = -(0)

y_A = 0

Отже, координати симетричної точки А відносно початку координат дорівнюють (-1, 0).

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