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tough geometry problem

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Source: — Data Sufficiency |
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by stop@800 » Sun Sep 28, 2008 8:06 am
IMO C

A:
with w you can solve the 4 angles around w and nothing else
clockwise (from w)it will be 95 85 95 85

B:
all angles around z
125 and 55


A+B
in 4 sides figure
sum of angles = 360
you have 2 values
and 2 as (180-x) and (180-y)
can solve to get x+y

C
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by 4meonly » Sun Sep 28, 2008 8:11 am
I think C

these 4 lines form a quadrilateral
it's internal angles will be
180-x
180-y
180-w
180-z
The summ of these angles will be 360
180-x+180-y+180-w+180-z = 360
x+y+w+z = 360
we need x+y=?
Only (1) and (2) can give us what we want to find
x+y+125+95 = 360
x+y = 140

C

OA?
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by erukumk » Mon Sep 29, 2008 6:37 am
Thanks for the replies

OA: C
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