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7th Class Mathematics Practical Geometry Question Bank Practical Geometry

  • question_answer
    A right triangle DEF is constructed with \[DE=5\text{ }cm,\] \[\angle F={{90}^{o}}\] and \[DF=4\text{ }cm\]. Choose the correct statement from the following.

    A)  DE is the hypotenuse of \[\Delta DEF\].

    B)  \[\angle E+\angle D={{90}^{o}}\]

    C)  \[EF=3cm\]

    D)  All the above.  

    Correct Answer: D

    Solution :

     By Pythagoras' theorem, one of the perpendicular sides is 3 cm. and by angle sum property, \[\angle D+\angle E={{180}^{o}}-\angle F\]\[={{180}^{o}}-{{90}^{o}}={{90}^{o}}\]


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