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      Question

      In a triangle, the three interior angles are in the

      ratio 3 : 4 : 5. What is the measure of the largest angle?
      A 75° Correct Answer Incorrect Answer
      B 45° Correct Answer Incorrect Answer
      C 85° Correct Answer Incorrect Answer
      D 25° Correct Answer Incorrect Answer

      Solution

      ATQ, Let angles be 3k, 4k, 5k. Sum of angles in a triangle = 180° 3k + 4k + 5k = 12k = 180° k = 180/12 = 15° Angles = 3k = 45°, 4k = 60°, 5k = 75° Largest angle = 75°

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