Ellipszis

B = Point(xAxis)
A = Point(xAxis)
C = Point(yAxis)
ellipszis = Ellipse(A, B, C)
D = Point(ellipszis)
f = Line(B, D)
d = Circle(D, A)
E = Intersect(d, f, 2)
vezérkör = Circle(B, E)
r = Segment(D, E)
r_1 = Segment(D, A)