Droites (IJ) et (LK)

Plan (ABD)

Plan (ABC)

Droite (AB)

Droites (KI) et (LJ)

A = (3, 0.5, 0.5)
B = (2, 4, 0.5)
C = (-1, 2, 0.5)
D = (1, 1, 3)
a, faceABC, faceABD, faceBCD, faceACD, arêteAB, arêteBC, arêteAC, arêteAD, arêteBD, arêteCD = Pyramid(A, B, C, D)
I = Translate(A, Vector[(1 / 5 * Vector[A, C])])
J = Translate(A, Vector[(1 / 5 * Vector[A, D])])
K = Midpoint(B, C)
L = Midpoint(B, D)
f = Line(J, I)
g = Line(L, K)
h = Line(J, L)
i = Line(K, I)
E = Intersect(h, i)
j = Line(A, B)
b = Plane(A, B, D)
c = Plane(A, B, C)
d = false
l = false
k = false
m = false
e = false