22. PORS is a parallelogram and SRMN is a square, Prove that triangle PSN and triangle
QRM are congruent triangles.
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(i) Because PQRS is a square
∠PSR=∠QRS=90
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Now In △SRT
∠TSR=∠TRS=60
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∠PSR+∠TSR=∠QRS+∠TRS
⟹∠TSP=∠TRQ
Now in △TSP and △TRQ
TS=TR
∠TSP=∠TRQ
PS=QR
Therefore , △TSP≡△TRQ
So PT=QT
(ii) Now in △TQR,
TR=QR(RQ=SR=TR)
∠TQR=∠QTR
And ∠TQR+∠QTR+∠TRQ=180
⟹∠TQR+∠QTR+∠TRS+∠SRQ=180
⟹2(∠TQR)+60+90=180 (∠TQR=∠QTR)
2(∠TQR)=30
⟹∠TQR=15
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