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Is quadrilateral ABCD a rectangle?

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Manager
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GMAT 1: 490 Q47 V13
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Is quadrilateral ABCD a rectangle?  [#permalink]

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New post 06 Mar 2019, 21:23
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Is quadrilateral ABCD a rectangle?

I. ABCD is a parallelogram.
II. ABCD is a square.
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Joined: 02 Aug 2009
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Re: Is quadrilateral ABCD a rectangle?  [#permalink]

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New post 07 Mar 2019, 00:04
Is quadrilateral ABCD a rectangle?

I. ABCD is a parallelogram.
Every rectangle is a parallelogram, but vice-versa is not true. It is not necessary that every parallelogram is a rectangle
Insufficient

II. ABCD is a square.
Every square is a rectangle and a parallelogram, but vice-versa is not true.
Sufficient to say that ABCD is a rectangle

B
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Re: Is quadrilateral ABCD a rectangle?  [#permalink]

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New post 08 Mar 2019, 21:26
chetan2
chetan2u wrote:
Is quadrilateral ABCD a rectangle?

I. ABCD is a parallelogram.
Every rectangle is a parallelogram, but vice-versa is not true. It is not necessary that every parallelogram is a rectangle
Insufficient

II. ABCD is a square.
Every square is a rectangle and a parallelogram, but vice-versa is not true.
Sufficient to say that ABCD is a rectangle

B
How come every square is a rectangle I thought that square has all sides equal while a rectangle has opposite sides equal .
Thanks
Manager
Manager
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S
Joined: 18 Feb 2019
Posts: 163
Location: India
GMAT 1: 490 Q47 V13
GPA: 3.6
Re: Is quadrilateral ABCD a rectangle?  [#permalink]

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New post 08 Mar 2019, 22:54
bridgetnamugga wrote:
chetan2
chetan2u wrote:
Is quadrilateral ABCD a rectangle?

I. ABCD is a parallelogram.
Every rectangle is a parallelogram, but vice-versa is not true. It is not necessary that every parallelogram is a rectangle
Insufficient

II. ABCD is a square.
Every square is a rectangle and a parallelogram, but vice-versa is not true.
Sufficient to say that ABCD is a rectangle

B
How come every square is a rectangle I thought that square has all sides equal while a rectangle has opposite sides equal .
Thanks


It's a property of the quadrilateral. Every square is a rectangle, but inversely it's not correct.
GMAT Club Bot
Re: Is quadrilateral ABCD a rectangle?   [#permalink] 08 Mar 2019, 22:54
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Is quadrilateral ABCD a rectangle?

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