f(x) = x - 2
eq1: x = 1
eq2: x = 4
a = Surface(f, 45, xAxis)
A = Intersect(f, eq2)
B = Intersect(f, eq1)
C = Intersect(f, xAxis)
g = Segment(C, A)
b = Surface(g, 45, xAxis)
h = Segment(C, B)
c = Surface(h, 45, xAxis)