laturi -PR,PQ ,QR
laruri -LM,MN,LN
laturi-DF,FE,EF
laturi - XZ,ZY,YX
unghiuri -RPQ,PQR,QRP
unghiuri -LMN,LNM,MLN
unghiuri -DFE,FDE,EDF .
unghiuri-ZXY,YXZ,ZYX
2
CAB,BCA,CBA
MNO,MON,NOM
MKL,LMK,KLM
PSR,RPS,SPR
