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Sign knowledge

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Master | Next Rank: 500 Posts
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by sanjib » Wed May 27, 2009 2:27 pm
In the figure above, what is the measure of ÐCAT?

(1) AB ^ AT and AC ^ AD.

(2) AB bisects ÐCAD.





Statement (1) ALONE is sufficient, but statement (2) ALONE is not sufficient.



Statement (2) ALONE is sufficient, but statement (1) ALONE is not sufficient.



BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.



EACH statement ALONE is sufficient.



Statements (1) and (2) TOGETHER are NOT sufficient.

Pls help about the sign what this mean
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Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
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Re: Sign knowledge

by sacx » Thu May 28, 2009 2:54 am
As I can gather the question is asking for the degree measure of angle CAT

STMT I

1. AB ^ AT and AC ^ AD ( assuming ^ = perpendicular)

angle CAD = 90 and angle BAT = 90

Insuff

2. AB bisects ÐCAD

Insuff, as we do not know the degree measure of angle CAD

STM I & II,

CAB = 45, BAD = 45

BAT = 90

BAD + DAT = 90
45 + DAT = 90
DAT = 45

CAT = CAB + BAD + DAT
CAT = 45+45+45 = 135

Suff

C
SACX
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by abhinav85 » Thu May 28, 2009 9:52 am
Hey Sacx, how you get this????


STMT I

1. AB ^ AT and AC ^ AD ( assuming ^ = perpendicular)

angle CAD = 90 and angle BAT = 90
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by sanjib » Thu May 28, 2009 11:28 pm
does gmat really give this kind of sign?
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