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Is quadrilateral Q a square?

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Is quadrilateral Q a square?  [#permalink]

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New post 28 Nov 2007, 15:19
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A
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C
D
E

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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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New post 25 Oct 2013, 08:28
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jlgdr wrote:
shubhampandey wrote:
yogachgolf wrote:
Is quadrilateral Q a square?

(1) The sides of Q have the same length.
(2) The diagonals of Q have the same length

In a parallelogram, not all the sides have the same length from what I understand.
Or am I missing something?


Parallelogram CAN have all 4 sides of equal length.

Parallelogram A quadrilateral with two pairs of parallel sides.
Image
Properties and Tips
• Opposite sides of a parallelogram are equal in length.
• Opposite angles of a parallelogram are equal in measure.

• Opposite sides of a parallelogram will never intersect.
• The diagonals of a parallelogram bisect each other.
• Consecutive angles are supplementary, add to 180°.
The area, \(A\), of a parallelogram is \(A = bh\), where \(b\) is the base of the parallelogram and \(h\) is its height.
• The area of a parallelogram is twice the area of a triangle created by one of its diagonals.

A parallelogram is a quadrilateral with opposite sides parallel and congruent. It is the "parent" of some other quadrilaterals, which are obtained by adding restrictions of various kinds:
• A rectangle is a parallelogram but with all angles fixed at 90°
• A rhombus is a parallelogram but with all sides equal in length
• A square is a parallelogram but with all sides equal in length and all angles fixed at 90°

For other properties check polygons chapter of Math Book: math-polygons-87336.html
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New post 28 Nov 2007, 15:40
С. only both can let us a square.
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New post 28 Nov 2007, 16:05
yogachgolf wrote:
why 'a' is insuff?


you can imagine four sticks with same length that are pinned by hinges. you can easily transform the square to a different rhombuses and even to a line.
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Re: Square  [#permalink]

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New post 28 Nov 2007, 16:24
yogachgolf wrote:
Is quadrilateral Q a square?
(1) The sides of Q have the same length.
(2) The diagonals of Q have the same length


C

Here il post u a drawing.
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Re: Geometry DS  [#permalink]

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New post 05 Aug 2010, 06:24
Statement 1 is not sufficient since a rhombus has 4 equal sides as well.

Statement 2 is not sufficient since a rectangle has equal diagonals.

Statements 1 and 2 are sufficient.
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New post 25 Oct 2013, 06:35
shubhampandey wrote:
yogachgolf wrote:
walker wrote:
С. only both can let us a square.


why 'a' is insuff?


Because it can be a parellogram or rhombus..


In a parallelogram, not all the sides have the same length from what I understand.
Or am I missing something?
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Re: Re:  [#permalink]

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New post 15 Apr 2014, 01:10
HI Bunnel,

As you have mentioned that Parallelogram can have four sides equal then definitely its diagonals are also equal and it will become square. why A is not right?
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New post 15 Apr 2014, 01:19
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Re: Is quadrilateral Q a square?  [#permalink]

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New post 05 Jun 2014, 03:43
A is insufficient cause rhombus is a quadrilateral with four sides & diagonals of dfferent lengths
B is insufficient cause a uniform Trapezoid has both the diagonals equal..

C is sufficient as trapezoid and rhombus are both eliminated.Hence a square
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Re: Square  [#permalink]

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New post Updated on: 05 Jun 2014, 05:20
GMATBLACKBELT wrote:
yogachgolf wrote:
Is quadrilateral Q a square?
(1) The sides of Q have the same length.
(2) The diagonals of Q have the same length


C

Here il post u a drawing.


This is an incorrect explanation cause a hexagon is not a quadrilateral and instead a uniform trapezium or a rectangle is a better alternative
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Originally posted by JusTLucK04 on 05 Jun 2014, 03:45.
Last edited by JusTLucK04 on 05 Jun 2014, 05:20, edited 1 time in total.
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Re: Is quadrilateral Q a square?  [#permalink]

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New post 05 Jun 2014, 03:50
yogachgolf wrote:
Is quadrilateral Q a square?

(1) The sides of Q have the same length.
(2) The diagonals of Q have the same length



Statement I is insufficient:

Rhombus have same lengths and so does a square.

Statement II is insufficient:

Sides may or may not be same.

Combining is sufficient:

If sides are same and diagonals are same which means all the sides must intersect at ninety degrees hence answer is c.
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Re: Is quadrilateral Q a square? (1) The sides of Q have the  [#permalink]

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New post 28 Sep 2015, 01:57
C is the answer as it can be solved by using both the statements.
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Re: Is quadrilateral Q a square?  [#permalink]

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New post 19 Dec 2018, 08:57

Project DS Butler: Day 44: Data Sufficiency (DS88)


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Bumping for DS Butler project.
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Re: Is quadrilateral Q a square?  [#permalink]

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New post 25 Sep 2019, 00:56
Just to be a bit more clearer to learners like myself - Rhombuses DONT have diagonals of equal length.

If the diagonals of a parallelogram are of equal length then the shape is a rectangle or square.

So if the diagonals of a rhombus are equal then the shape is a square.
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Re: Is quadrilateral Q a square?   [#permalink] 25 Sep 2019, 00:56
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