A = (0, 1)
B = (4, 1)
C = (3, 4)
poly1, c, a, b = Polygon(A, B, C)
d, e = AngularBisector(c, a)
f, g = AngularBisector(a, b)
h, i = AngularBisector(b, c)
D = Intersect(h, d)
E = Intersect(d, f)
F = Intersect(f, h)