E_1 = (-6.057978163022511, -11.480476279221453)
H = (5.6184798416796085, -3.088022088341805)
I = (18.936939753292965, -3.015044225812417)
a = Segment(H, I)
B' = Rotate(I, 70.0*°, H)
α = Angle(I, H, B')
G = Rotate(H, 320.0*°, I)
β = Angle(G, I, H)
b = Ray(H, G)
c = Segment(H, G)
d = Segment(G, I)