I have gave the question there that 1st diagram I want the answer
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Solution:-
In Δ QTR
∠ TQR + ∠ QRT + ∠ QTR = 180°
⇒ 40° + y + 90° = 180°
⇒ x = 180° - 130°
⇒ x = 50°
∠ QSP = ∠ SPR + ∠ SRP
Reason : Exterior angle = sum of interior angles
⇒ y = 30° + y
⇒ y = 30° + 50°
⇒ y = 80°
So, ∠ y = 80° and ∠ x = 50°
In Δ QTR
∠ TQR + ∠ QRT + ∠ QTR = 180°
⇒ 40° + y + 90° = 180°
⇒ x = 180° - 130°
⇒ x = 50°
∠ QSP = ∠ SPR + ∠ SRP
Reason : Exterior angle = sum of interior angles
⇒ y = 30° + y
⇒ y = 30° + 50°
⇒ y = 80°
So, ∠ y = 80° and ∠ x = 50°
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