A': (1.16611, 1.18031)
B': (4.82413, 2.2365)
f = Line(A', B')
C' = Point(f)
g = Line(A', C')
X = (2.5, 2.5)
h = Line(X, A')
c = Circle(X, A')
Y = Intersect(c, h, 2)
d = Circle(Y, X)
Z = Intersect(d, h, 2)
i = Line(X, B')
j = Line(Y, C')
P = Intersect(i, j)
k = Line(Z, P)
D = Intersect(g, k)