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7th Class Mathematics Perimeter and Area Question Bank Perimeter and Area

  • question_answer
    If the length of the diagonal of a square is \[12\sqrt{2}\,\,cm,\] what is its perimeter?

    A)  \[38\,cm\]         

    B)         \[44\,cm\]

    C)  \[48\,cm\]           

    D)         \[54\,cm\]

    Correct Answer: C

    Solution :

      Given length of the diagonal of a square \[=12\sqrt{2}\,\,cm\] If 'a' is the side of the square, then the length of diagonal is \[\sqrt{2}a.\] \[\therefore \]  \[\sqrt{2}a=12\sqrt{2}\] \[\Rightarrow \] \[a=12\] \[\therefore \]   Perimeter \[=4a=4\times 12=48\text{ }cm\]


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