A = (2, 4)
B = (0, 0)
a = Segment(A, B)
C = (6, 0)
u = Vector(B, C)
v = Vector(A, C)
w = Vector(C, A)
F = Midpoint(a)
E = Midpoint(A, C)
D = Midpoint(B, C)
z = Vector(E, F)
b = Vector(B, D)
c = Segment(E, D)
d = Segment(D, F)