M = Intersect(xAxis, yAxis)
P = Point(yAxis)
c = Circle(M, P)
A = Point(c)
B = Point(c)
C = Point(c)
D = Point(c)
Vieleck1, c_1, d, e, f = Polygon(A, B, C, D)
a = Segment(A, C)
b = Segment(B, D)
S = Intersect(b, a)