$\vec{u}$

$\vec{n}$

Hilfsebene

$\vec{u}$

$\vec{n}$

P: (5, 5, 6)
u: (-2, -2, 4)
P1: P + u
g = Line(P, P1)
Q: (2, -4, 0)
n: (0, 0, 4)
Q1: Q + n
w = Vector(P, P1)
a = Vector(Q, Q1)
S: (8, 8, 0)
E: z = 0
H = Plane(P, S, (0, 0, 0))
α = Angle(g, E)
b = false
S1: S + u
S2: S + n
v = Vector(S, S1)
c = Vector(S, S2)