ü: (x + 2)^(2) + y^(2) = 1
A = Point(ü)
A_x: (x(A), 0)
B: (-2, 0)
D: (-1, 0)
O: (0, 0)
g = Segment(B, A)
α = Angle(D, B, A)
c = CircleSector(B, D, A)
Sulg: (α, y(A))
C: (α, 0)
h = Segment(A, Sulg)
i = Segment(O, C)
f = Segment(B, A_x)
j = Segment(A_x, A)
k = Segment(Sulg, C)