A = (-0.9, 0.76)
B = (2.26, 1.68)
u = Vector(A, B)
C = (3.94, 3.38)
v = Vector(B, C)
D = (2.6, 5.32)
w = Vector(C, D)
E: D - u
F: E - v
a = Segment(A, D)
b = Segment(B, E)
c = Segment(C, F)