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8th Class Mathematics Practical Geometry Question Bank Geometry

  • question_answer
    In the given figure, \[{{115}^{o}}\]\[{{95}^{o}}\] and \[\angle PAD={{30}^{o}}\]. If AO = 5.4 cm, OC = 7.2 cm and BO = 6 cm, then the length of DO is

    A) 4.5cm              

    B) 4cm

    C) 5cm                

    D) 6.5cm

    Correct Answer: A

    Solution :

    \[{{40}^{o}}\] DA, OM and CB are perpendicular to AB. We have\[{{50}^{o}}\] Now, AC and DB are two transversals to these parallel lines. The result of proportional intercepts on parallel lines. We have, \[{{55}^{o}}\]  \[{{108}^{o}},{{72}^{o}}\]\[{{72}^{o}},{{36}^{o}}\]\[{{100}^{o}},{{80}^{o}}\] \[{{144}^{o}},{{36}^{o}}\]  \[\angle P=\angle R={{100}^{o}}\]      


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