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# I seem to be missing something obvious here:

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Senior Manager
Joined: 27 Aug 2005
Posts: 331
I seem to be missing something obvious here: [#permalink]

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05 Sep 2005, 19:20
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I seem to be missing something obvious here:

In the figure above, segments AD and AC divide angle EAB into three nonoverlapping angles that are equal in measure. Are AE and AB equal in length?

(2) AC = CB
Intern
Joined: 01 Sep 2005
Posts: 3

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05 Sep 2005, 19:34
Answer is E because we don't know if the bottom line is straight or not.
Senior Manager
Joined: 27 Aug 2005
Posts: 331

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05 Sep 2005, 21:01
Hmmm... instructions say diagrams are drawn to agree with information in the question stem (though not necessarily in the two statements). So I think we can assume the line is straight.

OE is A. I'm not sure why it's not D though. Why is statement 2 insufficient? Seems to me like it ought to be enough.
Manager
Joined: 19 Jul 2005
Posts: 54

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05 Sep 2005, 23:23
coffeeloverfreak wrote:
I seem to be missing something obvious here:

In the figure above, segments AD and AC divide angle EAB into three nonoverlapping angles that are equal in measure. Are AE and AB equal in length?

(2) AC = CB

From 1. Yes it is sufficient
2 is insufficient

Explainations later
Director
Joined: 13 Nov 2003
Posts: 789
Location: BULGARIA

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06 Sep 2005, 00:08
agree that it makes sence to be A
B) is incorrect. angle EAB is separated into three parts and each part is equal to Q/3. From B) angle EBA is also equal to Q/3. Then for the statement that AE=AB to be true angle EBA should equal to angle AEB both equal to Q/3. Now angle AEB=180-4Q. Note that when Q=36 degrees the triangle is isosceles and B) is suff. BUt if Q is different from 36 degrees then B) is insufficient so A) is the only correct choice.
Intern
Joined: 05 May 2005
Posts: 44

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06 Sep 2005, 12:57
coffeeloverfreak wrote:
I seem to be missing something obvious here:

In the figure above, segments AD and AC divide angle EAB into three nonoverlapping angles that are equal in measure. Are AE and AB equal in length?

(2) AC = CB

(1) since <EAD, <DAC, and <CAB are equivalent having sides AD = AC will have to make AE = AB so SUFFICIENT

(2) if sides AC = AB, although <EAD, <DAC, and <CAB are equivalent side AE can continue to extend longer than AC or AB. There is no information here that states segment ADCB forms a linear line so it is INSUFFICIENT

Intern
Joined: 25 Jun 2005
Posts: 23
Location: Bay Area, CA

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25 Sep 2005, 17:20
Can someone please explain why A is sufficient?
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Director
Joined: 23 Jun 2005
Posts: 841
GMAT 1: 740 Q48 V42

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25 Sep 2005, 17:54
BG wrote:
agree that it makes sence to be A
B) is incorrect. angle EAB is separated into three parts and each part is equal to Q/3. From B) angle EBA is also equal to Q/3. Then for the statement that AE=AB to be true angle EBA should equal to angle AEB both equal to Q/3. Now angle AEB=180-4Q. Note that when Q=36 degrees the triangle is isosceles and B) is suff. BUt if Q is different from 36 degrees then B) is insufficient so A) is the only correct choice.

Got A without any problem, but why statement II is not sufficient is still beyond me. Can you please elaborate on your explanation? Thanks!
25 Sep 2005, 17:54
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