PA+2PB+3PC=0
(PA+2PB+3PC)xPA=0xPA (x :cross product )
2PBxPA+3PCxPA=0
2|PBxPA|=3|PCxPA|
S1=(3/2)S3 (1)
also
PA+2PB+3PC=0
(PA+2PB+3PC)xPB=0
|PAxPB|=3|PCxPB|
S1=3S2 (2)
from (1) ,(2)
S1:S2:S3= 1:3:3/2=2:6:3
PA+2PB+3PC=0
(PA+2PB+3PC)xPA=0xPA (x :cross product )
2PBxPA+3PCxPA=0
2|PBxPA|=3|PCxPA|
S1=(3/2)S3 (1)
also
PA+2PB+3PC=0
(PA+2PB+3PC)xPB=0
|PAxPB|=3|PCxPB|
S1=3S2 (2)
from (1) ,(2)
S1:S2:S3= 1:3:3/2=2:6:3