B = (0, 6)
A = Point(yAxis)
F = Point(xAxis)
a = Segment(A, F)
b = Segment(A, B)
D = Point(a)
c = OrthogonalLine(D, a, xOyPlane)
d = OrthogonalLine(B, b, xOyPlane)
C = Intersect(d, c)
poly1, b_1, c_1, d_1, a_1 = Polygon(B, C, D, A)
poly2, f, d_2, c_2 = Polygon(D, C, F)