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The area of a square is 444 sqcm Find the lengt... - JAMB Mathematics 2007 Question

The area of a square is 444 sqcm. Find the length of the diagonal.
A
12\(\sqrt{2}\) cm
B
11\(\sqrt{3}\)cm
C
13 cm
D
12 cm
correct option: a

Area S2 = 144sqcm

s = (\sqrt{144}) = 12 cm

Length of diagonal = (\sqrt{12^2 + 12^2})

= (\sqrt{144}) + 144

= (\sqrt{228})

= 12(\sqrt{2})cm

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