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If square WXYZ above has an area of 100, what is the length of diagona

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SVP
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If square WXYZ above has an area of 100, what is the length of diagona [#permalink]

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New post 27 Apr 2017, 23:56
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A
B
C
D
E

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  15% (low)

Question Stats:

90% (00:17) correct 10% (00:31) wrong based on 30 sessions

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If square WXYZ above has an area of 100, what is the length of diagonal XZ ?

A. 10
B. 10\(\sqrt{2}\)
C. 10\(\sqrt{3}\)
D. 100\(\sqrt{2}\)
E. 100\(\sqrt{3}\)

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Re: If square WXYZ above has an area of 100, what is the length of diagona [#permalink]

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New post 28 Apr 2017, 02:24
Area = side^2 = 100
Side is 10
Diagonal of square is side * sqrt(2)
In this case its 10 * sqrt(2) (Option B)
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Re: If square WXYZ above has an area of 100, what is the length of diagona [#permalink]

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New post 02 May 2017, 16:54
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SajjadAhmad wrote:
If square WXYZ above has an area of 100, what is the length of diagonal XZ ?

A. 10
B. 10\(\sqrt{2}\)
C. 10\(\sqrt{3}\)
D. 100\(\sqrt{2}\)
E. 100\(\sqrt{3}\)


In determining the length of diagonal XZ, we may recall that the diagonal of a square is always equal to side√2.

Since the area of the square is 100, and area = side^2, the side of the square is equal to 10.

Thus, the diagonal = 10√2.

Answer: B
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Re: If square WXYZ above has an area of 100, what is the length of diagona   [#permalink] 02 May 2017, 16:54
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