Trissecção

Seleccione 2 pontos (extremos do segmento de recta)

g = Segment(H, I)
h = Circle(H, I)
k = Circle(I, H)
J = Intersect(h, k, 2)
p = Circle(J, H)
i = Ray(I, J)
K = Intersect(p, i, 2)
L = Intersect(h, k, 1)
j = Segment(K, L)
M = Intersect(g, j)
q = Circle(M, H)
N = Intersect(q, g, 2)