\text{Priamky }\overleftrightarrow{AB},\overleftrightarrow{CD}\text{ sú mimobežné

\text{Priamky }\overleftrightarrow{AC},\overleftrightarrow{BD}\text{ sú mimobežné

\text{Priamky }\overleftrightarrow{BC},\overleftrightarrow{AD}\text{ sú mimobežné

A = (2, -2, 0)
B = (2, 3, 0)
C = Point(Circle[Midpoint[A, B], (Distance[A, B] * sqrt(3) / 2), Segment[A, B]])
a, D, stenaABC, stenaACD, stenaABD, stenaBCD, hranaAC, hranaAB, hranaBC, hranaAD, hranaCD, hranaBD = Tetrahedron(A, B, C)
f = Line(A, B)
g = Line(D, C)
b = true
h = Line(A, C)
i = Line(D, B)
c = false
j = Line(C, B)
k = Line(A, D)
d = false