A = (-4.84, -1.34)
B = (-1.18, 3.22)
a = Line(A, B)
C = (4.2, -1.34)
b = Line(B, C)
c = Line(C, A)
α = Angle(C, A, B)
β = Angle(A, B, C)
γ = Angle(B, C, A)
D = Point(c)
δ = Angle(D, C, B)
texto1: "\alpha + \beta=\delta\\

\textcolor{green}{" + (LaTeX[α]) + "}+\textcolor{blue}{" + (LaTeX[β]) + "}=\textcolor{red}{" + (LaTeX[δ]) + "}"
d = Line(B, c)
E = Point(b)
F = Point(a)
G = Point(d)
ε = Angle(G, B, F)
ζ = Angle(G, B, E)
η = Angle(F, B, E)