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)
O = Intersect(d, e)
f = OrthogonalLine(O, b)
g = OrthogonalLine(O, c)
h = OrthogonalLine(O, a)
F = Intersect(b, f)
E = Intersect(h, a)
D = Intersect(c, g)
i = Segment(O, A)
j = Segment(O, B)
k = Segment(O, C)
l = Segment(O, E)
m = Segment(O, F)
n = Segment(O, D)
p = Circle(O, F)
α = Angle(C, E, O)
β = Angle(A, F, O)
γ = Angle(B, D, O)