A = Intersect(xAxis, yAxis)
c = Circle(A, 1)
B = Intersect(c, xAxis, 2)
b = 0.25 (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)
E = Intersect(l, xAxis)
q = Segment(A, E)
r = Segment(D', E)
d = OrthogonalLine(A, k)
α = Angle(D, A, D')
texte4 = LaTeX(α, true, true)
E' = Rotate(E, π - (b * π), A)
β = Angle(E, A, E')
f = Segment(A, E')
g = Ray(A, E')
C = Intersect(c, g)
h = Segment(C, A)
i = OrthogonalLine(C, xAxis)
F = Intersect(i, xAxis)
j = Segment(C, F)
m = Segment(F, A)