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The area of a square is 144 sq cm. Find the length of its diagonal

The area of a square is 144 sq cm. Find the length of its diagonal
  • A.
    11(sqrt{3cm})
  • B.
    12cm
  • C.
    12(sqrt{2cm})
  • D.
    13cm
Correct Answer: Option C
Explanation

BD = (sqrt{x^2 + x^2})
= (sqrt{12^2 + 12^2})
= (sqrt{144 + 144})
= 2(144)
= 12(sqrt{2cm})

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