A = Point(xAxis)
B = Point(yAxis)
f = Segment(B, A)
C = Point(yAxis)
D = (9, 0)
E = (15, 0)
F = Point(yAxis)
g = Segment(C, D)
h = Segment(F, E)
G = (0, 0)
H = Intersect(g, h)
I = Intersect(f, g)
gl1: (30 * x) + (30 * y) = 60
Vieleck1, g_1, f_1, h_1, i, a = Polygon(G, F, H, I, A)