A = (-3, -1)
B = (4, -4)
C = (4, 6)
Vieleck1, a, b, c = Polygon(B, C, A)
D = Midpoint(a)
E = Midpoint(b)
F = Midpoint(c)
s_{BC} = LineBisector(a)
s_{AC} = LineBisector(b)
s_{AB} = LineBisector(c)
U = Intersect(s_{BC}, s_{AB})
d = Circle(U, C)
e = Segment(A, U)
f = Segment(U, B)
g = Segment(U, C)