Question on: JAMB Mathematics - 1991
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
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Correct Option: C
BD = \(\sqrt{x^2 + x^2}\)
= \(\sqrt{12^2 + 12^2}\)
= \(\sqrt{144 + 144}\)
= 2(144)
= 12\(\sqrt{2cm}\)
= \(\sqrt{12^2 + 12^2}\)
= \(\sqrt{144 + 144}\)
= 2(144)
= 12\(\sqrt{2cm}\)
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