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8th Class Mathematics Practical Geometry Question Bank Geometry

  • question_answer
    ABC is a triangle whose sides BC and CA are produced to D and E respectively. If \[{{100}^{o}},{{80}^{o}}\]\[{{144}^{o}},{{36}^{o}}\], then the value of \[\angle P=\angle R={{100}^{o}}\] is

    A)  \[\angle S={{75}^{o}}\]                            

    B)  \[\angle Q\]

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

    D)  \[{{85}^{o}}\]

    Correct Answer: C

    Solution :

    \[{{42}^{o}}\]   (Linear pair) Now, exterior angle of triangle is equal to sum of opposite interior angles. \[\angle ACB={{65}^{o}}\] \[\angle ABC\] \[{{25}^{o}}\] \[{{35}^{o}}\] \[PQ||RS\] 


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