A = Intersect(xAxis, yAxis)
B = Point(xAxis)
D = Point(xAxis)
E = (4, 1)
F = (5, 1)
G = Point(xAxis)
poly1, d, e, f, g = Polygon(D, E, F, G)
a: π * 100 / poly1
i(x) = x^(2)