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# There is a quadrangle ABCD(Clock-wise). Is ABCD a square? 1)

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Director
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There is a quadrangle ABCD(Clock-wise). Is ABCD a square? 1) [#permalink]  18 Jan 2006, 04:21
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There is a quadrangle ABCD(Clock-wise). Is ABCD a square?

1) AB=BC=CD=DA

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Auge um Auge, Zahn um Zahn !

GMAT Club Legend
Joined: 07 Jul 2004
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1) Insufficient. Could be a rhombus

2) Insufficient. We do not know if BAD and ADC are right angles, or BAD could be 170 degrees while ADC is 10 degrees.

Using both, we know that BAD and ADC are right angles since the sides must be equal.

Ans: C
Director
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E.

The BAD + ADC can also be equal to 180 in rombus.
SVP
Joined: 14 Dec 2004
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cool_jonny009 wrote:
E.

The BAD + ADC can also be equal to 180 in rombus.

geeeeeeeeeeeee......
Senior Manager
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1 more for E as it could be a rhombus
Senior Manager
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Answer is C... both to gather sufficient..
CEO
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Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
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This is E

St1: Could be a rhombus, square. INSUFF

St2: Still could be a rhombus, rectangle, square. INSUFF

Combined:

Could be a rhombus or square. INSUFF

Initially after seeing so many Cs as answers, I started scratching my head. But atlast a sigh of relief.
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SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

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lhotseface wrote:
E. could be rhombus

agreed. yest it could be rohmbus.

then Angle BCD (90) +Angle ABC (90) =180

then Angle BCD (50) +Angle ABC (130) =180

so insuff.....
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