D = (5.5037628493745885, 0.6348832704305407)
E = (9.995526225929867, -2.71381487409814)
F = (12.072363055950051, 0.07140040957234921)
a = Segment(D, E)
b = Segment(E, F)
c = Segment(D, F)
d = LineBisector(a)
e = LineBisector(b)
α = Angle(F, E, D)
distanceDF = Distance(D, F)
f = Circle(D, F, E)
A = Center(f)