N = (4, 2.84)
L = (0.78, 0.78)
g = Line(N, L)
P = Rotate(N, 90.0*°, L)
α = Angle(N, L, P)
Lotgerade = Line(P, L)
β = Angle(P, N, L)
a = Line(P, N)
L' = Rotate(L, 45.0*°, N)
γ = Angle(L, N, L')
b = Line(N, L')
Q = Intersect(Lotgerade, b)