C = (2, 4)
B = (6, 4)
A = (5, 1)
a = Segment(C, B)
b = Segment(B, A)
Z = (-2.476910614391872, 1.6432452508988964)
k = 1 (slider from -5 to 5, step 0.1)
c = Segment(A, C)
α = Angle(B, A, C)
C' = Dilate(C, k, Z)
B' = Dilate(B, k, Z)
a' = Segment(C', B')
A' = Dilate(A, k, Z)
d = Segment(A', B')
e = Segment(A', C')
β = Angle(B', A', C')