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

It is currently 22 Sep 2018, 00:25

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49300
In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC  [#permalink]

Show Tags

New post 05 Feb 2015, 08:58
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

62% (01:32) correct 38% (01:30) wrong based on 177 sessions

HideShow timer Statistics

In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC less than 5?

(1) Segment AB = 2√2
(2) Angle BCA is 30 degrees.

Kudos for a correct solution.

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Manager
Manager
User avatar
Joined: 14 Oct 2014
Posts: 66
Location: United States
GMAT 1: 500 Q36 V23
Re: In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC  [#permalink]

Show Tags

New post 05 Feb 2015, 19:54
2
(1) Not sufficient.
(2) Not sufficient. Just knowing the values of all angles does not allow us to find the area.

(1)+(2) Sufficient. From (1) we know that AB is 2√2, so if we spit the triangle ABC into two triangles drawing a line from the angle ABC, we can get a two special right triangles. First triangle 45-45-90 with a hypotenuse 2√2 and the second triangle 30-60-90. From that point we can find all the needed values.
Answer C
Intern
Intern
User avatar
Joined: 09 May 2012
Posts: 18
Re: In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC  [#permalink]

Show Tags

New post 25 Aug 2015, 13:22
1
1
I don't think we require splitting and spend time on it. Once we know all three angles and length of one side, other sides can be known through the ratio of these angles. However it is not essential but the formula to find the lengths is a/sin A = b/Sin B = c/Sin C
Manager
Manager
avatar
B
Status: Turning my handicaps into assets
Joined: 09 Apr 2017
Posts: 125
Re: In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC  [#permalink]

Show Tags

New post 05 Jan 2018, 06:43
Bunuel, could you please provide a detailed solution for this question?
_________________

If time was on my side, I'd still have none to waste......

Re: In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC &nbs [#permalink] 05 Jan 2018, 06:43
Display posts from previous: Sort by

In triangle ABC, angle ABC is 105 degrees. Is the area of triangle ABC

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


cron

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.