I = (1.9328925619834731, 0.8558076634109681)
M = (-1.688444778362131, 2.914410217881291)
N = (1.557235161532683, 2.824252441773101)
u = Vector(M, N)
N' = Mirror(N, I)
M' = Mirror(M, I)
v = Vector(M', N')
a = Segment(N, I)
b = Segment(I, N')
c = Segment(M, I)
d = Segment(I, M')