\[K - середина\ отрезка\ \text{AD.}\]
\[Точка\] | \[Координаты\ точки\] | ||
---|---|---|---|
\[A\] | \[( - 3;\ 1)\] | \[( - 8;\ 2)\] | \[(11;\ 2)\] |
\[D\] | \[( - 1;\ - 3)\] | \[(0;\ 10)\] | \[( - 9;\ 2)\] |
\[K\] | \[( - 2;\ - 1)\] | \[( - 4;\ 6)\] | \[(1;\ 2)\] |
\[x_{1} = \frac{- 3 - 1}{2} = - 2;\ \ \ \]
\[y_{1} = \frac{1 - 3}{2} = - 1.\]
\[x_{2} = 2 \bullet ( - 4) + 8 = 0;\ \ \ \]
\[y_{2} = 2 \bullet 6 - 2 = 10.\]
\[x_{3} = 2 \bullet 1 + 9 = 11;\ \ \ \]
\[y_{3} = 2 \bullet 2 - 2 = 2.\]