A = (-0.14, 4.88)
B = (4.12, 2.92)
a = Segment(A, B)
b = OrthogonalLine(B, a)
C = Point(b)
m = Midpoint(A, C)
c = Circle(m, A)
D = Point(c)
d = Segment(A, D)
e = Segment(D, C)
f = Segment(C, B)
α = Angle(A, B, C)
β = Angle(C, D, A)