***BRAINLIEST*** 30 PTS! PLEASE HELP!
(see attachment)

Answer: X: PQ^2 +QR^2=PR^2; Y: SAS postulate.
Step-by-step explanation: As shown in question PQR=EFG and order matters. As for SAS he’s trying to prove an angle. Picture of triangle shows going in order (ORDER MATTERS!) side P angle Q side R