7th Class Mathematics The Triangle and its Properties Question Bank The Triangle and Its Properties

  • question_answer
    Which of the following options is INCORRECT?                    

    A)  \[\angle 1=\angle 3\]

    B)  \[\angle 1+\angle 4+\angle 5={{180}^{o}}\]

    C)  \[\angle 8=\angle 6\]

    D)  \[\angle 1+\angle 3={{180}^{o}}\]

    Correct Answer: D

    Solution :

    \[\angle 1=\angle 2\]and \[\angle 2=\angle 3\] [Alternate angles] So, \[\angle 1=\angle 3\] and \[\angle 1+\angle 4+\angle 5={{180}^{o}}\] [Angle sum property] Also, \[\angle 8=\angle 6\]                   [Alternate angles]


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