Question

Ajutor cat de repede se poate va rog!
Ma grabesc. Multumesc mult!​

Answer 1

Explicație pas cu pas:

a) plane : RMN, RNP, RPQ, RQM, MNPQ

b) drepte: RM, RN, RP, RQ, MN, NP, PQ, QM

c) perechi drepte paralele: (MN,QP), (MQ,NP)

d) perechi drepte concurente: (MR,MN), (MR,MQ), (MN,MQ), (NR,NM), (NR,NP), (NM,NP), (PR,PN), (PR,PQ), (PN,PQ), (QR,QP), (QR,QM), (QP,QM), (RM,RN), (RM,RP), (RM,RQ), (RN,RP), (RN,RQ), (RP,RQ)

e) perechi drepte necoplanare: (MN,RQ), (MN,RP), (NP,RM), (NP,RQ), (PQ,RM), (PQ,RN), (QM,RN), (QM,RP)

f) trei drepte concurente: (MR,MN,MQ), (NR,NM,NP), (PR,PN,PQ), (QR,QP,QM)