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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