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

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CEO
Joined: 15 Aug 2003
Posts: 3454
Triangle Easy one, but still want to check. whats the value [#permalink]

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17 Dec 2003, 03:21
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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, 07:27, edited 1 time in total.
CEO
Joined: 15 Aug 2003
Posts: 3454

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17 Dec 2003, 07:28
stoolfi wrote:
Is there a question here?

sorry about that stoolfi..i have edited the post
Director
Joined: 13 Nov 2003
Posts: 789
Location: BULGARIA

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17 Dec 2003, 08:29
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┬░
GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4288

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17 Dec 2003, 18:59
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
17 Dec 2003, 18:59
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