Answer:
Explanation:
In ∆PQR,
Angle R = 60° [As Angle Q is 60°]
In ∆SPR,
Angle a = Angle SRP = 45° [ As Angle S is 90°]
Angle b = Angle R - Angle SRP
So, b = 60° - 45° = 15°
HOPE IT HELPS ^_^
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