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      Question

      If PQ and PR are the two tangents to a circle with

      center O, and ∠QOR=150°, then ∠QPR is equal to: 
      A 60° Correct Answer Incorrect Answer
      B 30° Correct Answer Incorrect Answer
      C 90° Correct Answer Incorrect Answer
      D 45° Correct Answer Incorrect Answer

      Solution

      ATQ,

      ∠QPR = 180° − ∠QOR = 180° − 150° = 30°

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