A = Point(yAxis)
B = Point(xAxis)
a = Line(A, B)
b = Line((600, 0), (0, 750))
C = Intersect(a, b)
D = Intersect(b, xAxis)
E = Intersect(xAxis, yAxis)
Vieleck1, a_1, c, d, e = Polygon(A, C, D, E)
f = Line(D, (0, 900))