A = (4, 2)
B = (3.6950275514170285, -0.6253810217074941)
C = (8, 4)
D = (8, -3)
f = Line(C, D)
A' = Mirror(A, f)
g = Segment(B, A')
E = Intersect(f, g)
h = Segment(A, E)