9 puntos (circunferencia)

Triángulo

polígono1, c, a, b = Polygon(A, B, C)
d = OrthogonalLine(B, b)
e = OrthogonalLine(C, c)
f = OrthogonalLine(A, a)
G = Midpoint(b)
H = Midpoint(a)
I = Midpoint(c)
D = Point(b)
E = Point(c)
F = Point(a)
g = Line(E, I)
h = Line(D, G)
i = Line(H, F)
J = Intersect(h, d)
K = Intersect(f, i)
L = Intersect(g, e)
k = Circle(L, K, J)