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

 It is currently 19 Nov 2018, 14:03

### 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

## Events & Promotions

###### Events & Promotions in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
• ### How to QUICKLY Solve GMAT Questions - GMAT Club Chat

November 20, 2018

November 20, 2018

09:00 AM PST

10:00 AM PST

The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat.
• ### The winning strategy for 700+ on the GMAT

November 20, 2018

November 20, 2018

06:00 PM EST

07:00 PM EST

What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

# Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD

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

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 50670
Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD  [#permalink]

### Show Tags

05 Nov 2017, 01:02
1
1
00:00

Difficulty:

65% (hard)

Question Stats:

60% (01:21) correct 40% (01:33) wrong based on 109 sessions

### HideShow timer Statistics

Is ABC a right triangle? AB = 5; AC = 4.

(1) BC = 3
(2) AC = CD

Attachment:

2017-11-05_1301.png [ 8.32 KiB | Viewed 1034 times ]

_________________
Intern
Joined: 02 Sep 2015
Posts: 37
Location: India
Concentration: General Management, Entrepreneurship
Schools: Sauder 'Dec 18
GPA: 3.79
WE: General Management (Energy and Utilities)
Re: Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD  [#permalink]

### Show Tags

05 Nov 2017, 01:21
1
S1: since BC =3, the sides are 3,4,5 which is pythagoras triplet. Hence yes it is right angle triangle. Sufficient
S2 : AC = CD. But it gives no information regarding the triangle ABC, hence it is not sufficient.

Answer is A

Sent from my 2014818 using GMAT Club Forum mobile app
Manager
Joined: 22 May 2017
Posts: 88
GMAT 1: 580 Q41 V29
GMAT 2: 580 Q43 V27
Re: Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD  [#permalink]

### Show Tags

06 Nov 2017, 09:25
Bunuel wrote:

Is ABC a right triangle? AB = 5; AC = 4.

(1) BC = 3
(2) AC = CD

Attachment:
2017-11-05_1301.png

STATEMENT 1 SATISFY THE PYTHAGORAS THEOREM, SO STATEMENT IS SUFFICIENT.
STATEMENT 2 IS INSUFFICIENT, IT DOES NOT PROVE THAT ABC IS AN RIGHT ANGLE TRIANGLE.
ANSWER IS OPTION A
Manager
Joined: 10 Dec 2011
Posts: 89
Location: India
Concentration: Finance, Economics
GMAT Date: 09-28-2012
WE: Accounting (Manufacturing)
Re: Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD  [#permalink]

### Show Tags

11 Nov 2017, 07:31
1
A because I is sufficient, II does not provide any info about ABC
Intern
Joined: 11 Nov 2017
Posts: 22
Location: India
Concentration: Finance, Technology
Schools: ISB '19 (D)
GMAT 1: 710 Q49 V38
GPA: 3.5
WE: Consulting (Consulting)
Re: Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD  [#permalink]

### Show Tags

11 Nov 2017, 10:12
2
A is the answer.
3,4,5 is a pythagorean triplet. Statement 1 is sufficient

Statement 2 doesnt mention the lenghts.
DS Forum Moderator
Joined: 21 Aug 2013
Posts: 1371
Location: India
Re: Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD  [#permalink]

### Show Tags

27 Nov 2017, 22:47
Question has already been answered as A. Though I want to add one thing, which might be useful to someone who doesnt know. In the case we were given that BD=AB (i.e., the bigger triangle ABD is isosceles), then the second statement would have also sufficed on its own to answer this question.

Thats because second statement states that BC is a median (AC=CD), and in an isosceles triangle, median drawn from the vertex of intersection of equal sides (or you can say median from vertex to the non-equal side) acts as a perpendicular bisector also, and divides the bigger isosceles triangle into two congruent right angle triangles.
Re: Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD &nbs [#permalink] 27 Nov 2017, 22:47
Display posts from previous: Sort by

# Is ABC a right triangle? AB = 5; AC = 4. (1) BC = 3 (2) AC = CD

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

 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®.