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      Question

      In a parallelogram, two adjacent angles are (3x + 10)°

      and (x + 30)°. Find the larger angle.
      A 180° Correct Answer Incorrect Answer
      B 115° Correct Answer Incorrect Answer
      C 128° Correct Answer Incorrect Answer
      D 162° Correct Answer Incorrect Answer

      Solution

      ATQ, Adjacent angles in a parallelogram are supplementary: (3x + 10) + (x + 30) = 180 4x + 40 = 180 4x = 140 x = 35 Angles: 3x + 10 = 3*35 + 10 = 105 + 10 = 115° x + 30 = 35 + 30 = 65° Larger angle = 115°

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