GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 22 Oct 2019, 04:51

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Is the triangle depicted above equilateral? (1) x + y + z = 180° (2)

Author Message
TAGS:

### Hide Tags

Senior RC Moderator
Joined: 02 Nov 2016
Posts: 4136
GPA: 3.39
Is the triangle depicted above equilateral? (1) x + y + z = 180° (2)  [#permalink]

### Show Tags

27 Mar 2019, 06:54
00:00

Difficulty:

25% (medium)

Question Stats:

95% (00:33) correct 5% (00:24) wrong based on 21 sessions

### HideShow timer Statistics

Attachment:

XXDD.jpg [ 5.27 KiB | Viewed 380 times ]
(Figure not necessarily drawn to scale.)

Is the triangle depicted above equilateral?

(1) $$x + y + z = 180°$$

(2) $$y = z$$

Source: McGraw-Hill's GMAT

_________________
Math Expert
Joined: 02 Aug 2009
Posts: 8006
Re: Is the triangle depicted above equilateral? (1) x + y + z = 180° (2)  [#permalink]

### Show Tags

27 Mar 2019, 07:27
Attachment:
XXDD.jpg
(Figure not necessarily drawn to scale.)

Is the triangle depicted above equilateral?

(1) $$x + y + z = 180°$$
This is the case for any triangle, so no new information at all.
Surely all choices containg statement I are out, so A, C and D are out

(2) $$y = z$$
We know the triangle is isosceles triangle, but it could be x=y=z. so Insuff
B is also out

Combined..

E
_________________
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 5031
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Is the triangle depicted above equilateral? (1) x + y + z = 180° (2)  [#permalink]

### Show Tags

27 Mar 2019, 07:46
#1
x+y+z=180
no info whether its equilaterial, isosceles ∆ ; in sufficient
#2
y=z
so
x+2y=180
so ∆ can be isoscles or may not be in case x=y ; in sufficient
from1 & 2
we cannot derive any info
IMOE

Attachment:
XXDD.jpg
(Figure not necessarily drawn to scale.)

Is the triangle depicted above equilateral?

(1) $$x + y + z = 180°$$

(2) $$y = z$$

Source: McGraw-Hill's GMAT
Senior Manager
Joined: 25 Feb 2019
Posts: 336
Re: Is the triangle depicted above equilateral? (1) x + y + z = 180° (2)  [#permalink]

### Show Tags

27 Mar 2019, 09:08
statement 1.

sum of all angles is 180 .

but it may be any triangle . insufficient

statement 2

y=z

insufficient .

Even if we combined these two,

we get ,

x+2y = 180 , we can not solve this equation to get unique values

Hence Option E

Neither of these is sufficient .

Posted from my mobile device
Re: Is the triangle depicted above equilateral? (1) x + y + z = 180° (2)   [#permalink] 27 Mar 2019, 09:08
Display posts from previous: Sort by