Circunferencia = Point(Ray[(0, 0), Vector[(-1, 0)]])
c = Circle((0, 0), Circunferencia)
A', A = Intersect(c, yAxis)
X = Point(c)
O = Intersect(xAxis, yAxis)
f = Ray(O, X)
yX = Point(f)
u = Vector(O, A)
v = Vector(O, yX)
w: u + v
g = Segment(yX, X)