Координаты векторов.

Question

Координаты векторов.

---

Answer 1

AC = (4-13; 0 - (-2)) = (-9; 2)

|BC| = √(7² + 6²) = √(49 + 36) = √85

середина AB = ((13-3)/2; (-2-6)/2) = (5; -4)

|AC| = √(9² + 4²) = √(81 + 16) = √97

|AB| = √(16² + 4²) = √(256 + 16) = √272 = 4√17

P = 4√17 + √97 + √85