A = Point(xAxis)
B: (0.0, x(A))
a = Line(A, B)
C = Point(xAxis)
D: (0.0, x(A) - x(C))
E: (x(C), y(D))
F = Intersect(xAxis, yAxis)
poly1, f, c, e, d = Polygon(F, C, E, D)