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Source: — Data Sufficiency |
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by BeatGMATinGVA » Sat Apr 18, 2009 9:41 am
This is a paralelogramme thus:

x+y = 180 and x = z

i) sufficient - we have two equations, two unknown

3x = 180
x= 60

ii) sufficient
x+z = 120 and x=z thus x = 120/2 = 60
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Re: || gram

by kanha81 » Sat Apr 18, 2009 4:50 pm
piyush_nitt wrote:OA : D
Drawing from the properties of Parallelogram-

1) y=2x
Opposite angles are equal and sum of all the interior angles is 360
y + x + z + u = 360
=> 2x + x + x + 2x = 360 (b/c, z=x; u=y=2x)
=> Suff.

A or D

2) x + z = 120
=> x + x = 120
=> Suff.

Hence [spoiler][D][/spoiler]
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