Wektory (pomijam strzałki nad oznaczeniem wektora).
A(17, 31), B(53, 58), C(c1, c2), D(d1, d2)
| 1 | 1 | |||
AC = | AB ⇒ [c1 − 17, c2 − 31] = | [53 − 17, 58 − 31] | ||
| 3 | 3 |
| 1 | ||
c1 − 17 = | *36 ⇒ c1 = 12 + 17 = 29 | |
| 3 |
| 1 | ||
c2 − 31 = | *27 ⇒ c2 = 9 + 31 = 40 | |
| 3 |
| 2 | ||
AD = | AB | |
| 3 |