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# Is quadrilateral Q a square? (1) The sides of Q have the

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Is quadrilateral Q a square? (1) The sides of Q have the [#permalink]

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11 Jan 2006, 13:33
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Is quadrilateral Q a square?
(1) The sides of Q have the same length.
(2) The diagonals of Q have the same length.

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11 Jan 2006, 13:44
C

St 1: It can be a square or ||gram
St2: It can be a square or rectangle

Combined: Must be a square
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11 Jan 2006, 16:50
C.

the angles all come out to be 90 degrees.

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11 Jan 2006, 17:29
E?

It could be a pentagon also!!

A regular Pentagon also have same sides and equal diagonals.
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11 Jan 2006, 17:43
giddi77 wrote:
E?

It could be a pentagon also!!

A regular Pentagon also have same sides and equal diagonals.

"Is quadrilateral Q a square"
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11 Jan 2006, 18:04
ps_dahiya wrote:
giddi77 wrote:
E?

It could be a pentagon also!!

A regular Pentagon also have same sides and equal diagonals.

"Is quadrilateral Q a square"

This is what happens when you come back from a sleepy meeting. Thanks dahiya!
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11 Jan 2006, 21:45
How about Rhombus ?

Don't they have all four sides equal ?

I am not sure about the length of the diagonal, but I know the diagonals are perpendicular..

Any thoughts ?
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11 Jan 2006, 22:30
Itzrevs wrote:
How about Rhombus ?

Don't they have all four sides equal ?

I am not sure about the length of the diagonal, but I know the diagonals are perpendicular..

Any thoughts ?

A Rhombus is an equilateral ||gram.
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11 Jan 2006, 23:17
I would go with E.

a)Sides having same length - Square,Parallelogram,Rhombus
b)Diagonals having same length-Square,Rhombus

So E.

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11 Jan 2006, 23:53
andy_gr8 wrote:
I would go with E.

a)Sides having same length - Square,Parallelogram,Rhombus
b)Diagonals having same length-Square,Rhombus

So E.

Diagonals of a Rhombus are not equal. Square is a special kind of Rhombus whose diagnols are equal.

See this.

http://mathworld.wolfram.com/Rhombus.html

Guys, correct me if I am wrong.
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12 Jan 2006, 20:58
Thanks ps_dahiya. Clarified with rhombus.

Now the statements can interpreted as

Statement 1 : Square or Parallelogram or Rhombus
Statement2: Square or rectangle

Combining both gives Square go with C.
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12 Jan 2006, 22:04
One more for C. The GMAT rarely tests rhombuses.

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13 Jan 2006, 09:57
Good job guys , the OA is C.

I considered it rhombus and got it wrong.

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13 Jan 2006, 09:57
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# Is quadrilateral Q a square? (1) The sides of Q have the

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