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ds: quadrilateral [#permalink] New post 29 Mar 2005, 05:33
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pls expl
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 [#permalink] New post 29 Mar 2005, 12:37
C) !

1) it could be a rhombus or a parallelogramm => insuff

2) it could be a square or a rhombus => insuff

1) + 2) it should be a rhombus. AC is longer that BD. draw it on an paper an you will see that it isnt`t possible that AC = BD or BD > AC.
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 [#permalink] New post 29 Mar 2005, 15:16
Look at the two figures given below.

Though the angle ABC > BCD, the diagonals can be greater or smaller based on any situation.
....A......................B
.....____________
.....\......................\
.......\......................\
.........\......................\
...........\.___________\
............D......................C

and

...............A.....................B
.............._____________
--........../.........................\
.........../............................\
........../...............................\
........./________________\
........D.................................C

Insufficient.

From statement (2), if its a rhombus, then the answer is different (unknown) and if its a square, the answer is known (no).

Insufficient.

Combine them, and the first figure goes, and so the answer can be provided.

Hence (C).
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 [#permalink] New post 09 Apr 2005, 20:42
BUT I KNOW,,,,,IF 1 SIDE IS COMMON ,,,,THEN SIDE OPPOSITE BIGGER ANGLE IS LONGER,,,

SO I GUESS A ,shold be it

OA?
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i hate when people do'nt post the OA, it leaves in guessing!!!!

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 [#permalink] New post 10 Apr 2005, 03:26
kapslock, you're definitely an engineer :-D :-D
Did you use AutoCad for that drawing? :P
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 [#permalink] New post 10 Apr 2005, 03:33
thearch wrote:
kapslock, you're definitely an engineer :-D :-D
Did you use AutoCad for that drawing? :P


And theArch, you're definitely Sherlock Holmes :) Yes I am an Engineer !!

Actually, I had to put in the dots because the "intelligent" software does not (or renders irregularly) the spaces, so the figure with spaces tend to go absolutely kaput :)
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 [#permalink] New post 10 Apr 2005, 09:30
OK i didnt need to know much about this problem

I used a very simple trick...thought chrisoph is absolutely correct (but I forgot my rules, its been a while since I picked up my GMAT prep)

anyway my approach was this....knowing angle is not enough, I need to know the size (relative) of the sides as well...I guess I need two pieces of info, one the angle and the lenght of the sides to know if one particular side is bigger or not!

C it is...
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 [#permalink] New post 10 Apr 2005, 14:37
kapslock wrote:
thearch wrote:
kapslock, you're definitely an engineer :-D :-D Did you use AutoCad for that drawing? :P

And theArch, you're definitely Sherlock Holmes :) Yes I am an Engineer !!
Actually, I had to put in the dots because the "intelligent" software does not (or renders irregularly) the spaces, so the figure with spaces tend to go absolutely kaput :)

Sherlock Holmes in GMAT too. Agree C and both of you.
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Re: ds: quadrilateral [#permalink] New post 27 Nov 2009, 10:57
Will somebody please explain this using the properties of quadrilateral??
why cant A be sufficient ???
Re: ds: quadrilateral   [#permalink] 27 Nov 2009, 10:57
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