A = (2.58, -3.36)
B = (6.48, -3.58)
B' = Rotate(B, 70*°, A)
α = Angle(B, A, B')
a = Line(A, B')
B'_1 = Rotate(B, 80*°, A)
β = Angle(B, A, B'_1)
b = Line(A, B'_1)
c = Segment(A, B)
A' = Rotate(A, -60*°, B)
γ = Angle(A', B, A)
d = Line(A', B)
D = Intersect(d, b)
A'_1 = Rotate(A, -80*°, B)
δ = Angle(A'_1, B, A)
e = Line(B, A'_1)
C = Intersect(e, b)
E = Intersect(e, a)
f = Segment(D, E)
ε = Angle(D, E, A)