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8th Class Mathematics Practical Geometry Question Bank Geometry

  • question_answer
    In the below given figure, find\[\angle AOB\].

    A)  \[{{10}^{o}}\]                    

    B)  \[{{40}^{o}}\]                          

    C)  \[{{50}^{o}}\]                    

    D) None of these             

    Correct Answer: C

    Solution :

    We have \[\angle ACB\]    (Linear pair) \[{{42}^{o}}\] So  \[\angle ACB={{65}^{o}}\]  (\[\angle ABC\] \[{{25}^{o}}\]) \[{{35}^{o}}\]  (Linear pair) \[PQ||RS\] \[{{60}^{o}}\]  \[{{75}^{o}}\] In \[{{105}^{o}}\] \[{{85}^{o}}\]     [A.S.P] \[{{60}^{o}}\] \[\angle BAC={{45}^{o}}\]


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