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I think i saw this problem somewhere but couldn't find. Can

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Joined: 10 Jul 2009
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I think i saw this problem somewhere but couldn't find. Can [#permalink] New post 03 Sep 2009, 09:42
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A
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D
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
I think i saw this problem somewhere but couldn't find. Can anybody guide through the solution.
THanks
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DS1.jpg
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Status: What's your raashee?
Joined: 12 Jun 2009
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Location: United States (NC)
Concentration: Strategy, Finance
Schools: UNC (Kenan-Flagler) - Class of 2013
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Re: GMAT Prep Triangle DS [#permalink] New post 03 Sep 2009, 10:13
1. SUFF.

Lets say angle ABD is Y. We know angle BDC is 2x and that angles ABD + BAD = 2x since angle BDA is 180-DBC(2x) and so Y+X = 2x so we can figure out Y =X. With equal angles AD=BD. and in turn BD=BC

2. INSUFF since we might figure out the property like 1 but no known length to work with.

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Re: GMAT Prep Triangle DS [#permalink] New post 14 Sep 2009, 12:19
shaselai, good explanation. I did the same process and I believe this is the fastest one.
Re: GMAT Prep Triangle DS   [#permalink] 14 Sep 2009, 12:19
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I think i saw this problem somewhere but couldn't find. Can

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