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8th Class Mathematics Practical Geometry Question Bank Geometry

  • question_answer
    The angle which is one fifth of its supplement is

    A)  \[15{}^\circ \]                      

    B)  \[30{}^\circ \]

    C)  \[45{}^\circ \]                      

    D)  \[60{}^\circ \]

    Correct Answer: B

    Solution :

    Let the required angle be \[{{240}^{o}}\] Supplement of \[{{60}^{o}}\] Given: Since, \[{{120}^{o}}\] \[{{180}^{o}}\] \[\angle R={{138}^{o}}\]\[\angle PQS\]\[{{90}^{o}}\]\[{{42}^{o}}\] \[{{48}^{o}}\]


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