A = Point(yAxis)
B = (8, 2.52)
B' = Mirror(B, xAxis)
a = Segment(A, B')
C = Intersect(xAxis, a)
u = Vector(B, C)
v = Vector(C, A)
c = OrthogonalLine(A, Wasseroberfläche)
d = OrthogonalLine(A, c)
e = Segment(A, B)
f = Segment(B, B')
h = Segment((0.0, 0.0), A)
D = Intersect(f, d)
α = Angle(D, A, B)
β = Angle(B', A, D)