Răspuns :
a) segmente paralele║
AD║ DE║ CF
AB║DE
BC ║EF
AC║DF
b) segmente perpendiculare
AD ⊥ DF
BE ⊥ DF
EB ⊥ AC
CF ⊥ DF
AD║ DE║ CF
AB║DE
BC ║EF
AC║DF
b) segmente perpendiculare
AD ⊥ DF
BE ⊥ DF
EB ⊥ AC
CF ⊥ DF