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03 Feb 2011, 08:43
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
0% (00:00) correct
100%
(01:49)
wrong
based on 3
sessions
History
Date
Time
Result
Not Attempted Yet
What is the area of a square that has a diagonal of length 10?
A. 5
B. 10
C. 20
D. 40
E. 45
Source: Cliff's GMAT
A. 5
B. 10
C. 20
D. 40
E. 45
Source: Cliff's GMAT
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03 Feb 2011, 08:54
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gmatpapa
\(area_{square}=side^2=\frac{diagonal^2}{2}\): so A to be the answer either option A should read 50 instead of 5 or diagonal should be \(\sqrt{10}\) instead of 10.
03 Feb 2011, 09:02
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Bunuel
Yes. Answer quite clearly should be 50.
Does this OE make sense to you:
From the relationship that exists in a right triangle, we see that the sides of the square
must equal the square root of 5. Thus the area of the square is 5
