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    • Question

      In a triangle ABC, the in center is at O. Find angle BAC

      if angle BOC=110°.
      A 50° Correct Answer Incorrect Answer
      B 20° Correct Answer Incorrect Answer
      C 40° Correct Answer Incorrect Answer
      D 30° Correct Answer Incorrect Answer

      Solution

      When the bisector of ∠ B and ∠ C intersects At the O. Then – ∠ BOC =90 ° + ∠ A/2 110° =90 + ∠ A/2 ∠ A/2=20 ° ∠ A =20 °×2 =40° ∠ A =40°

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