A = (0.9, 1.6)
B = (4.64, 1.7)
c = Circle(A, B)
a = Line(A, B)
b = OrthogonalLine(B, a)
C = Point(c)
d = OrthogonalLine(C, b)
e = OrthogonalLine(C, a)
D = Intersect(b, d)
f = Line(A, D)
E = Intersect(e, f)