B = (0, 1)
C = (10, 1)
D = Point(xAxis)
A = (0, 0)
poly1, a, b, c, d = Polygon(A, B, C, D)
n = 2.7 (slider from 0 to x(C), step 0.1)
s = Segment((n, 0), (n, y(B)))
E: (n, 0)
F: (n, y(B))
poly2, a_1, e, f, b_1 = Polygon(A, E, F, B)