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Given:- A triangle ∆PQR in which PQ = PS . Value of ∠SRP = 25° . Also x = ∠SPR .
To Find:- The value of x and y .
Answer :- For figure refer to the attachment .
Now here in ∆PSQ , PQ = PS . So , ∠PQS = ∠PSQ ( since sides opposite to equal angles are equal ) .
Hence , ∠ PSQ = ∠PQS = y .
Also , here TR is a straight line . So , its angle will be 180° .
=> 110° + y = 180° .
=> y = 180° - 110° .
→ y = 70° .
★Hence the value of y is 70° .
Now , again in ∆PSR ;
=> ∠SPR + ∠PRS = ∠PSQ . [ By Exterior angle property ]
=> x + 25° = y.
=> x + 25° = 70° .
=> x = 70° -25°
→ x = 45°
★ Hence the value of x is 45° .
Hence the value of x is 45° and that of y is 70°.
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