In the given figure, angle PSQ = 125 degrees and angle PRT = 110 degrees. What is the value (in degrees) of angle SPR?

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Correct answer: D
Explanation
∠PSQ = 125°
∠PRT = 110°
Sum of angles on a straight line = 180°
Sum of angles in a triangle = 180°
∠PSR = 180° − 125° = 55°
∠PRS = 180° − 110° = 70°
In triangle PSR:
∠SPR + 55° + 70° = 180°
∠SPR = 180° − 125° = 55°