A = (1.56, 0.32)
B = (4.96, 1.24)
f = Line(A, B)
C = (4.2, -1.44)
g = Line(B, C)
h = Line(C, f)
i = Line(A, g)
D = Intersect(h, i)
a = 0 (slider from 0 to 5, step 1)
j = Line(D, B)
α = Angle(A, B, D)
β = Angle(C, D, B)
γ = Angle(D, B, C)
δ = Angle(B, D, A)
l = Segment(B, C)
n = Segment(D, A)
p = Line(A, C)
ε = Angle(C, A, B)
ζ = Angle(A, C, D)
O = Intersect(j, p)
q = Segment(A, O)
r = Segment(O, C)
s = Segment(O, B)
t = Segment(O, D)
b = Segment(A, D)
c = Segment(B, C)
η = Angle(B, O, A)
θ = Angle(D, O, C)
d = Segment(A, B)
e = Segment(D, C)
k = Segment(A, B)
m = Segment(D, C)
f_1 = Line(A, B)
g_1 = Line(D, C)