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# I got this one right but I am not sure abt th reasoning.

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Senior Manager
Joined: 18 Jun 2007
Posts: 280
I got this one right but I am not sure abt th reasoning.  [#permalink]

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14 Sep 2008, 12:33
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I got this one right but I am not sure abt th reasoning.

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SVP
Joined: 07 Nov 2007
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14 Sep 2008, 14:10
rishi2377 wrote:
I got this one right but I am not sure abt th reasoning.

angle RQS= angle RSQ= y
angle UST= angle TSU=z

angle PRT=m
angle UTS=n

90+m+n=180 --> m+n=90 ->(1)
y+y+m=180 --(2)
z+z+n=180 ---(3)

(2)+(3)

2(y+z)+m+n=360 --> 2(y+z)+90=360
y+z=135

x+y+z=180 --> x=45

C

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Re: PS: Geo1   [#permalink] 14 Sep 2008, 14:10
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