Summer is Coming! Join the Game of Timers Competition to Win Epic Prizes. Registration is Open. Game starts Mon July 1st.

 It is currently 23 Jul 2019, 04:58

### 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

# In the figure above, the angle marked at c has been created by extendi

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 56371
In the figure above, the angle marked at c has been created by extendi  [#permalink]

### Show Tags

04 Apr 2018, 23:24
00:00

Difficulty:

55% (hard)

Question Stats:

50% (00:56) correct 50% (00:59) wrong based on 62 sessions

### HideShow timer Statistics

In the figure above, the angle marked at c has been created by extending the base of the triangle, as shown. What is the sum of a, b, and c?

(1) a = 85
(2) b = 60

Attachment:

Triangle_with_extended_side.png [ 6.45 KiB | Viewed 804 times ]

_________________
Manager
Joined: 05 Feb 2016
Posts: 169
Location: India
Concentration: General Management, Marketing
WE: Information Technology (Computer Software)
Re: In the figure above, the angle marked at c has been created by extendi  [#permalink]

### Show Tags

04 Apr 2018, 23:36
2
Bunuel wrote:

In the figure above, the angle marked at c has been created by extending the base of the triangle, as shown. What is the sum of a, b, and c?

(1) a = 85
(2) b = 60

Attachment:
Triangle_with_extended_side.png

from fig b+c=180
from1:a=85

sum of a, b, and c=85+180
sufficient

from 2:insufficient
CEO
Joined: 12 Sep 2015
Posts: 3857
Re: In the figure above, the angle marked at c has been created by extendi  [#permalink]

### Show Tags

21 Feb 2019, 07:56
Top Contributor
Bunuel wrote:

In the figure above, the angle marked at c has been created by extending the base of the triangle, as shown. What is the sum of a, b, and c?

(1) a = 85
(2) b = 60

Attachment:
Triangle_with_extended_side.png

Target question: What is the sum of a, b, and c?
This is a good candidate for rephrasing the target question.

Since angles on a line add to 180°, we already know that b + c = 180
We get: a + b + c = a + 180
So, in order to find the sum of a, b and c, we need only find the value of a
REPHRASED target question: What is the value of a?

Aside: The video below has tips on rephrasing the target question

Statement 1: a = 85
Perfect! The answer to the REPHRASED target question is a = 85
Since we can answer the REPHRASED target question with certainty, statement 1 is SUFFICIENT

Statement 2: b = 60
We have no information about a
Since we cannot answer the REPHRASED target question with certainty, statement 2 is NOT SUFFICIENT

Cheers,
Brent

RELATED VIDEO FROM MY COURSE

_________________
Test confidently with gmatprepnow.com
Re: In the figure above, the angle marked at c has been created by extendi   [#permalink] 21 Feb 2019, 07:56
Display posts from previous: Sort by