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

  • question_answer
    In the given figure, \[AC\bot AB.\]find (i)\[\angle BAP,\] (ii) \[\angle CAQ.\]

    A)
    (i) (ii)
    \[{{15}^{o}}\] \[{{45}^{o}}\]
                   

    B)       
    (i) (ii)
    \[{{17}^{o}}\] \[{{45}^{o}}\]
                   

    C)       
    (i) (ii)
    \[{{15}^{o}}\] \[{{33}^{o}}\]
                   

    D)       
    (i) (ii)
    \[{{17}^{o}}\] \[{{33}^{o}}\]
                   

    Correct Answer: D

    Solution :

    \[\angle CAQ+\angle QAP+PAB={{90}^{o}}\] \[\because \]\[AC\bot AB\] So, \[2x+{{7}^{o}}+{{40}^{o}}+x+{{4}^{o}}={{90}^{o}}\] \[\Rightarrow \]\[3x+51={{90}^{o}}\Rightarrow x={{13}^{o}}\] (i) \[\angle BAP=(x+{{4}^{o}})={{(13+4)}^{o}}={{17}^{o}}\] (ii)\[\angle CAQ=(2x+{{7}^{o}})={{(26+7)}^{o}}={{33}^{o}}\]


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