A = Intersect(xAxis, yAxis)
c = Circle(A, 1)
B = Intersect(c, xAxis, 2)
b = 0.62 (slider from 0 to 2, step 0.01)
D = Intersect(c, xAxis, 2)
D' = Rotate(D, b * π, A)
γ = Angle(D, A, D')
k = Segment(A, D')
l = OrthogonalLine(D', xAxis, xOyPlane)
E = Intersect(l, xAxis)
q = Segment(A, E)
r = Segment(D', E)
d = OrthogonalLine(A, k, xOyPlane)
α = Angle(D, A, D')
a = OrthogonalLine(A, k, xOyPlane)
C, F = Intersect(c, a)
e = OrthogonalLine(C, xAxis, xOyPlane)
G = Intersect(xAxis, e)
f = Segment(A, C)
g = Segment(C, G)
β = Angle(C, A, D')
δ = Angle(C, A, G)
h = Segment(A, G)