A = (13, -4)
B = (9.62, 2.04)
C = (2.9, -7.48)
poly1, c, a, b = Polygon(A, B, C)
d, e = AngularBisector(c, b)
f, g = AngularBisector(c, a)
P = Intersect(e, g)
h = OrthogonalLine(P, b)
E = Intersect(b, h)
k = Circle(P, E)