a) coplanare in (ABC'D'), (ABD'), (BD'C'), (AD'C'), (ABC') si paralele
b) necoplanare
c) necoplanare
d) coplanare in (AA'D'D), (AA'D'), (ADD'), (DA'D'), (AA'D) si paralele
e) necoplanare
f) coplanare in (A'B'C'D'), (A'B'D'), (B'D'C'), (A'B'C), (A'C'D) si perpendiculare
g) coplanare in (ABCD), (ABD), (BDC), (ABC) si (ADC), concurente in D sub un unghi de 45°
h) necoplanare
i) necoplanare