I don't understand.
im thinking A and B
Each side of P'Q'R' is twice that of its corresponding side of PQR
So
P'R'
___ = 2 is true
PR
Also
P'Q'
____ = 2 multiply both sides by PQ
PQ
P'Q' = 2PQ subtract 2PQ from both sides
P'Q' - 2PQ = 0 is also true