A: (0, 0, 0)
B: (6, 0, 0)
C: (6, 6, 0)
D: (0, 6, 0)
S: (3, 3, 4)
f = Segment(B, C)
g = Segment(D, A)
h = Segment(C, D)
i = Segment(A, B)
j = Segment(C, S)
k = Segment(D, S)
l = Segment(B, S)
m = Segment(A, S)