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17 Jul 2019, 00:37
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B
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79% (00:44) correct
21%
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Which of the following represents the length of the diagonal d of a square with area a?
A. \(d=a^2\)
B. \(d= \sqrt{2a}\)
C. \(d=2 \sqrt{a}\)
D. \(d= a \sqrt{2}\)
E. \(d= a \sqrt{3}\)
A. \(d=a^2\)
B. \(d= \sqrt{2a}\)
C. \(d=2 \sqrt{a}\)
D. \(d= a \sqrt{2}\)
E. \(d= a \sqrt{3}\)
17 Jul 2019, 00:52
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if the area of a square equals to 'a',
the side of square will be √a
Diagonal of a square is d^2= (√a)^2+(√a)^2
d=√2*a
the answer choice is D
the side of square will be √a
Diagonal of a square is d^2= (√a)^2+(√a)^2
d=√2*a
the answer choice is D
17 Jul 2019, 01:14
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Bunuel
Side of square \(= \sqrt{a}\)
Length of diagonal \(= side * \sqrt{2} = \sqrt{2a}\)
IMO B
