Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 26 May 2017, 00:12

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Is the quadrilateral ABCD a parallelogram? 1. AB=BC 2.

Author Message
Manager
Joined: 09 May 2006
Posts: 99
Location: Bangalore, India
Followers: 2

Kudos [?]: 42 [0], given: 0

### Show Tags

03 Jun 2006, 09:50
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:24) correct 0% (00:00) wrong based on 3 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is the quadrilateral ABCD a parallelogram?

1. AB=BC

2. BC=CD=DA
Manager
Joined: 19 Apr 2006
Posts: 231
Followers: 1

Kudos [?]: 2 [0], given: 0

### Show Tags

03 Jun 2006, 10:20
this is a Yes or No question...

We know that ABCD is a Quadrilateral but that is all the information we get. But the definition of a Quadrilateral is a four sided polynomial, so we can not assume it is square or a rectangular.

1) not sufficient because it only tells us that two sides are equal to each other. A and D out.

2) not sufficient because it only tells us that three sides are equal to each other. What about AB? B is out...

Left with C or E...

By combining both, I still feel that there is still not enough information because we know that the lengths are the same, but how about the angles? or are any of the lines parallel from each other. I can draw a shape of a bow tie with all lines to be the same length and it will not be considered a parallelogram... am I looking at this problem in weird way? comments anyone?

I go with E
Director
Joined: 13 Nov 2003
Posts: 789
Location: BULGARIA
Followers: 1

Kudos [?]: 52 [0], given: 0

### Show Tags

03 Jun 2006, 10:34
IMO a quadrilateral with 4 equal sides should be paralelogram.
SO C
IF you split the quadrilatteral in 2 triangles at the short or the long diagonals, then the cross angles are equal which means that sides are parallel
VP
Joined: 21 Sep 2003
Posts: 1060
Location: USA
Followers: 3

Kudos [?]: 79 [0], given: 0

### Show Tags

03 Jun 2006, 10:41
Yep agree iwth BG:

Here are 5 ways to conclude if a quadrilateral is a parallelogram:
1. Opposite sides are PARALLEL (AB||CD & AD||BC)
2. Opposite sides are EQUAL (AB =CD and AD=BC)
3. Two sides are EQUAL and PARALLEL (AB = CD and AB is parallel to CD)
4. Opposite angles are EQUAL (ABC = ADC & BAD = BCD)
5. Diagonals BISECT each other.
_________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

- Bernard Edmonds

Manager
Joined: 09 May 2006
Posts: 99
Location: Bangalore, India
Followers: 2

Kudos [?]: 42 [0], given: 0

### Show Tags

03 Jun 2006, 11:18
giddi77 wrote:
Yep agree iwth BG:

Here are 5 ways to conclude if a quadrilateral is a parallelogram:
1. Opposite sides are PARALLEL (AB||CD & AD||BC)
2. Opposite sides are EQUAL (AB =CD and AD=BC)
3. Two sides are EQUAL and PARALLEL (AB = CD and AB is parallel to CD)
4. Opposite angles are EQUAL (ABC = ADC & BAD = BCD)
5. Diagonals BISECT each other.

Correct answer is C. Great tip giddi77!
Manager
Joined: 10 May 2006
Posts: 186
Location: USA
Followers: 1

Kudos [?]: 5 [0], given: 0

### Show Tags

03 Jun 2006, 20:42
Thanks for the clarification giddi.
03 Jun 2006, 20:42
Display posts from previous: Sort by