A = Intersect(xAxis, yAxis)
B = Point(xAxis)
c = Circle(A, B)
α = 1.7453292519943295 rad (slider from 0 to 6.283185307179586, step 2*°)
C = Rotate(B, α, A)
β = Angle(B, A, C)
D = Intersect(c, xAxis, 2)
a = Line(D, C)
d = Segment(A, C)
b = Mirror(a, d)
E = Intersect(b, xAxis)
γ = Angle(D, C, A)
δ = Angle(A, C, E)
ε = Angle(A, D, C)
e = CurveCartesian((1 / 3 * ((2 * cos(t)) - cos((2 * t)))), (1 / 3 * ((2 * sin(t)) - sin((2 * t)))), t, 0, 6.283185307179586)