Pour cette figure, on a choisi  a = 4.

A = (4, 0, 0)
B = (0, 4, 0)
C = (0, 0, 4)
O = (0, 0, -0.00233763569535661)
OAB, b, o, a = Polygon(O, A, B)
I = Midpoint(A, B)
d = Segment(C, I)
c, OAC, ABC_1, BCO, arêteCO, arêteAC_1, arêteBC_1 = Pyramid(OAB, C)
e = OrthogonalLine(O, ABC_1)
H = Intersect(e, ABC_1)
f = Segment(O, H)
g = Segment(O, I)
α = Angle(C, H, O, xOyPlane)
D = Mirror(H, O)
ADB, d_1, a_1, b_1 = Polygon(A, B, D)
h, ABC, BCD, ACD, arêteAC, arêteBC, arêteCD = Pyramid(ADB, C)
i = Segment(O, D)
j = Segment(O, B)