A = (11.639316029031859, 4.120122770328452)
B = (5.138509533767991, -4.488367080821749)
C = (20.222412104809933, -4.361398203961126)
đa giác1, c, a, b = Polygon(A, B, C)
d = AngularBisector(C, B, A)
e = AngularBisector(B, A, C)
I = Intersect(d, e)
f = OrthogonalLine(I, b)
g = OrthogonalLine(I, c)
h = OrthogonalLine(I, a)
E = Intersect(b, f)
D = Intersect(h, a)
F = Intersect(c, g)
i = Segment(I, A)
j = Segment(I, B)
k = Segment(I, C)
l = Segment(I, D)
m = Segment(I, E)
n = Segment(I, F)
p = Circle(I, E)
α = Angle(C, D, I)
β = Angle(A, E, I)
γ = Angle(B, F, I)
δ = Angle(D, B, I)
ε = Angle(I, B, A)
ζ = Angle(B, A, I)
η = Angle(I, A, C)
θ = Angle(A, C, I)
ι = Angle(I, C, B)