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# Need your thoughts on this

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Manager
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Need your thoughts on this [#permalink]

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21 Sep 2007, 21:11
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Need your thoughts on this.
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CEO
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Re: DS: Geometry [#permalink]

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22 Sep 2007, 00:46
Hang Tuah wrote:
Need your thoughts on this.

I am interested in the approach to this problem as well. I had this on my GMATPrep and answered E...
Director
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Re: DS: Geometry [#permalink]

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22 Sep 2007, 01:54
Hang Tuah wrote:
Need your thoughts on this.

I'm getting C.

Made the diag and for simplicity marked angle UST as Z, angle RSQ as Y, angle RQS as L, angle SQP as M, angle SUT as A and angle SUP as B.

Whew!!

Now:

x+y+z = 180
(y+z) = 180 - x ...............1

stat 1 : Y = L; doesn't help me. Insuff.

stat 2: Z = A; doesn't help me. insuff.

Stat 1 & 2: Y = L and Z = A

L + M = 180
Since L = Y, Y + M = 180, M = 180 - Y .............. 2

A+B = 180
Since A = Z, Z + B = 180, B = 180 - Z ..............3

Further in quad. PQSU, x + M + angle QPU + B = 360

x = 270 - (M + B)
x = 270 - (180 - Y + 180 - Z) ........ (from 2 & 3)
x = 270 - [360 - (Y + Z)]
x = 270 - [360 - (180 - x)] .........(from 1)
x= 270 - [180 - x] = 90 - x
x = 45 degrees

Hopefully that is right

Whats the OA?
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Re: DS: Geometry [#permalink]

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22 Sep 2007, 08:17
GK_Gmat wrote:
Hang Tuah wrote:
Need your thoughts on this.

I'm getting C.

Made the diag and for simplicity marked angle UST as Z, angle RSQ as Y, angle RQS as L, angle SQP as M, angle SUT as A and angle SUP as B.

Whew!!

Now:

x+y+z = 180
(y+z) = 180 - x ...............1

stat 1 : Y = L; doesn't help me. Insuff.

stat 2: Z = A; doesn't help me. insuff.

Stat 1 & 2: Y = L and Z = A

L + M = 180
Since L = Y, Y + M = 180, M = 180 - Y .............. 2

A+B = 180
Since A = Z, Z + B = 180, B = 180 - Z ..............3

Further in quad. PQSU, x + M + angle QPU + B = 360

x = 270 - (M + B)
x = 270 - (180 - Y + 180 - Z) ........ (from 2 & 3)
x = 270 - [360 - (Y + Z)]
x = 270 - [360 - (180 - x)] .........(from 1)
x= 270 - [180 - x] = 90 - x
x = 45 degrees

Hopefully that is right

Whats the OA?

I had this question on GMATPrep, and I got C, as far as I remember it was correct answer.
VP
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22 Sep 2007, 15:57
one more time firm C

long steps to post but very simple
22 Sep 2007, 15:57
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