A = (3.662514545454554, -6.433258181818182)
B = (-2.498, 5.202)
a = Line(A, B)
C = (6.852514545454557, 1.112741818181819)
b = OrthogonalLine(C, a)
D = Point(a)
c = Segment(C, D)
E = Intersect(a, b)
d = Segment(C, E)
α_1 = Angle(D, E, C)
α = Angle(E, C, D)
e = Distance(c, d)