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The area of a square is 144 sqcm. Find the length of the diagonal.

Mathematics
JAMB 2007

The area of a square is 144 sqcm. Find the length of the diagonal.

  • A. 13 cm
  • B. 12√2 cm
  • C. 12 cm
  • D. 11√3 cm
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Correct Answer: Option B
Explanation

Area of a square = x * x
144 = x2
√144 = x
12 = x
But d2 = 122 + 122
= 144 + 144
= 288
d = √288
= √144 x 2
= 12√2

There is an explanation video available below.


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Explanation Video

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JAMB CBT Mobile App 2025 - Free Download
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