Parabel-Scherung= Addition eines Geradenterms
Author: Prof. Dr.  Dörte Haftendorn
Date: 24.09.04

g(x) = x²
m = 1.0029999999999994
b = -1
s(x) = m x + b
f(x) = g(x) + s(x)
A = Intersect(s, xAxis)
a = OrthogonalLine(A, xAxis)
B = Point(g)
c = OrthogonalLine(B, a)
d = Line(B, a)
C = Intersect(f, d)
D = Intersect(c, a)
e = Segment(D, C)