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9th Class Mathematics Lines and Angles Question Bank Lines and angles

  • question_answer
    In the given figure, \[\mathbf{XY}\parallel \mathbf{PQ}\], then the value of x is:

    A)  \[{{75}^{{}^\circ }}\]                       

    B)  \[{{35}^{{}^\circ }}\]

    C)  \[{{65}^{{}^\circ }}\]    

    D)  \[{{45}^{{}^\circ }}\]

    Correct Answer: C

    Solution :

    (c): \[\angle BAO={{180}^{{}^\circ }}-({{70}^{{}^\circ }}+{{25}^{{}^\circ }})={{85}^{{}^\circ }}\]   Also, \[\angle AOB={{180}^{{}^\circ }}-({{85}^{{}^\circ }}+{{30}^{{}^\circ }})={{65}^{{}^\circ }}\]                                


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