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Is quadrilateral ABCD a rectangle?

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kiran120680
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Is quadrilateral ABCD a rectangle? [#permalink] 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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B
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chetan2u
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Re: Is quadrilateral ABCD a rectangle? [#permalink] New post   07 Mar 2019, 00:04
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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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bridgetnamugga
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Re: Is quadrilateral ABCD a rectangle? [#permalink] 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
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kiran120680
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Re: Is quadrilateral ABCD a rectangle? [#permalink] 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.
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gmatclubot
Re: Is quadrilateral ABCD a rectangle? [#permalink]
08 Mar 2019, 22:54
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Bunuel
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