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9th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-16

  • question_answer
    In a quadrilateral with distinct sides, if diagonals AC and BD intersects at right angle, then which of the following is true?

    A)  \[A{{B}^{2}}+B{{C}^{2}}=C{{D}^{2}}+D{{A}^{2}}\]

    B)  \[A{{B}^{2}}+C{{D}^{2}}=B{{C}^{2}}+D{{A}^{2}}\]

    C)  \[A{{B}^{2}}+A{{D}^{2}}+=B{{C}^{2}}+C{{D}^{2}}\]

    D)  \[A{{B}^{2}}+B{{C}^{2}}=2(C{{D}^{2}}+D{{A}^{2}})\]

    E)  None of these    

    Correct Answer: B

    Solution :

     Not Available


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