\vec a

\vec p

\vec w

\vec v

P

Bewege t mit den Pfeiltasten. 
Warum verschwindet die hellblaue Ebene zweimal?

gl1: (3 * x) + (2 * y) + (4 * z) = 11
n = Vector((3, 2, 4))
A: (1, -2, 3)
a = Vector(A)
S: (-2, -1 / 2, 4.5)
ap = Vector(A, S)
na = Vector(A, A + n)
α = Angle(ap, na)
u: (11 / 29 * n)
v = Vector(A, S)
H: (11 / 29 * (3, 2, 4))
f = Segment(S, H)
g = Segment(A, H)
ah = Vector(A, H)
β = Angle(na, ah)
O: (0, 0, 0)
A': (1, -2, 0)
b: sqrt(4.25)
S': (-2, -0.5, 0)
gl2: (x - 1)^(2) + (y + 2)^(2) = 11.25
h = OrthogonalLine(S', xOyPlane)
Q': (-2, -1 / 2, 0)
t0: atand(-1 / 2)
r: sqrt(45 / 4) / 2
c: t0 + π / 2
t = 21 (slider from 0 to 48, step 1)
d = CurveCartesian(1 + (r * cos(t0 + (π / 12 * t))), -2 + (r * sin(t0 + (π / 12 * t))), (1 / 4 * (12 - ((3 * r) * cos(t0 + (π / 12 * t))) - ((2 * r) * sin(t0 + (π / 12 * t))))), t, 0, 24)
Q: (1 + (r * cos(t0 + (π / 12 * t))), -2 + (r * sin(t0 + (π / 12 * t))), (1 / 4 * (12 - ((3 * r) * cos(t0 + (π / 12 * t))) - ((2 * r) * sin(t0 + (π / 12 * t))))))
w = Vector(A, Q)
γ = Angle(n, w)
B: A + n
δ = Angle(Q, A, B)
p_1 = Plane(A, S, Q)
C: A + (2 * w)
P: A + (2 * w) + (0.3 * v)
w' = Vector(A, C)
v' = Vector(C, P)
p = Vector(O, P)
D = (-3.7845454545454627, -3.347782705099784)
E = (-2.2767849223946848, -3.347782705099784)