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

  • question_answer
    In the given figure, the value of y is ____.

    A) \[{{24}^{o}}\]

    B)        \[{{22}^{o}}\]

    C)        \[{{20}^{o}}\]

    D)        \[{{10}^{o}}\]

    Correct Answer: C

    Solution :

    We have, \[\angle AOF=\angle COD=5y\](vertically opposite angles) Now, BOE is a straight line. \[\therefore \]\[3x+5y+y={{180}^{o}}\Rightarrow 9y={{180}^{o}}\Rightarrow y={{20}^{o}}\]


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