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Triangle Easy one, but still want to check. whats the value

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CEO
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Triangle Easy one, but still want to check. whats the value [#permalink] New post 17 Dec 2003, 02:21
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A
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C
D
E

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Triangle

Easy one, but still want to check.

whats the value of x?

1. z= x

2. y=x
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Last edited by Praetorian on 17 Dec 2003, 06:27, edited 1 time in total.
CEO
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Joined: 15 Aug 2003
Posts: 3470
Followers: 60

Kudos [?]: 666 [0], given: 781

 [#permalink] New post 17 Dec 2003, 06:28
stoolfi wrote:
Is there a question here?


sorry about that stoolfi..i have edited the post
Director
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 [#permalink] New post 17 Dec 2003, 07:29
Denote the internal angles at X with a , Y with b and Z with c. From St 1
1) z=x, or x=b+c, z=a+c =>a=b
2) y=x or a+b=b+c =>a=c ,
From 1) and 2) a=b=c,=> X=120┬░
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 [#permalink] New post 17 Dec 2003, 17:59
C is the answer
The formula is
(180-x)+(180-y)+(180-z)=180
540-x-y-z=180
x+y+z=360
Thus 1 alone is not sufficient nor 2 alone is.
Both of them are sufficient though
  [#permalink] 17 Dec 2003, 17:59
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Triangle Easy one, but still want to check. whats the value

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