A = (-6, -4)
B = (5, -4)
a = Segment(A, B)
C = (-1, 2)
b = Segment(B, C)
D = (-4, 2)
c = Segment(C, D)
d = Segment(D, A)
f = LineBisector(D, A)
g = LineBisector(C, B)
E = Intersect(d, f)
F = Intersect(g, b)
Mittellinie = Segment(E, F)
Parallele_1 = Line(A, B)
Parallele = Line(D, C)