a

α

A = (-14, 2)
B = (-2, 2)
C = (-8, 14)
f = Segment(A, B)
a = Segment(B, C)
g = Segment(A, C)
h = Line(B, C)
i = Line(C, A)
α = Angle(B, A, C)
β = Angle(C, B, A)
γ' = Angle(a, i)
γ = Angle(A, C, B)