Fluggerade
[5, 5, 4] + r·[2, 2, 1] = [2·r + 5, 2·r + 5, r + 4]
In Ebene einsetzen
2·(2·r + 5) + 2·(2·r + 5) + (r + 4) = 6 --> r = -2
A = [5, 5, 4] - 2·[2, 2, 1] = [1, 1, 2]
B = [1, 1, 2] - 4.5·[2, 2, 1]/|[2, 2, 1]| = [-2, -2, 0.5]
F: 2·x + 2·y + z = 2·(-2) + 2·(-2) + (0.5)
F: 2·x + 2·y + z = -7.5