S = pr

S \; = \;  \sqrt{ p(p-a)(p-b)(p-c) } 

A = (-0.33545043115326395, 1.2339389433683037)
B = (-1.0973923367202396, -0.15857557370237574)
C = (1.1283788455517627, -0.18860284091683782)
Tên đa giác1, c, a, b = Polygon(A, B, C)
d = AngularBisector(C, B, A)
e = AngularBisector(B, A, C)
D = Intersect(d, e)
f = OrthogonalLine(D, a)
E = Intersect(a, f)
g = Circle(D, E)
h = Segment(A, D)
i = Segment(D, B)
j = Segment(D, C)
r = Segment(D, E)