A = (2, 2)
B = (4, 2)
C = (4, 4)
D = (2, 4)
u = Vector(A, C)
E = (6, 6)
v = Vector(A, E)
a = Segment(C, B)
b = Segment(B, A)
F = (2, 4)
c = Segment(A, F)
d = Segment(F, C)