BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

triangle

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pmFollowed by: 523 members
Location: Milpitas, CA
Thanked: 1854 times
GMAT Score:770

by Anurag@Gurome » Mon Feb 28, 2011 4:24 am
(1) If ABC has dimensions 4-5-6, Area of ABC = 10 and DEF has dimensions 8-9-10; Perimeter of DEF= 27. Here Area of ABC < area of DEF.
If ABC and DEF have the same dimensions, say 4-6-8, then area of ABC = 12 and perimeter of DEF = 18. Here both the triangles will have same area.
Since we don't get a unique answer, so (1) is NOT SUFFICIENT.

(2) Angles of ABC = Angles of DEF implies that ABC and DEF are similar triangles. But here the area of ABC may or may not be greater than area of DEF.
So, (2) is also NOT SUFFICIENT.

Combining (1) and (2), consider the same examples as we did in statement 1, then again we we don't get a unique answer.

The correct answer is E.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1578
Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members
Thanked: 82 times
GMAT Score:720

by maihuna » Mon Feb 28, 2011 6:12 am
I think solve using example is *difficult* technique as coming with right contrast in exam timing is tough.

here is an interpretation of mine w/o contrast :

1. We only know area of abc < perimeter of def but there is no fix relation between area and perimeter for 345 triangle , perimeter 12, area 6, for 300400500 triangle perimeter 1200, area 60000.

The difference from anurag approach is we *do not* need an counter ex, just an understanding, basic understanding that area and perimeter are not correlated in any way.

2. Weonly knew the sides will be proportional, similar triangle, above exapmlesays it doesnhave any bearing on final outcome

combining too doesnt help.
Anurag@Gurome wrote:(1) If ABC has dimensions 4-5-6, Area of ABC = 10 and DEF has dimensions 8-9-10; Perimeter of DEF= 27. Here Area of ABC < area of DEF.
If ABC and DEF have the same dimensions, say 4-6-8, then area of ABC = 12 and perimeter of DEF = 18. Here both the triangles will have same area.
Since we don't get a unique answer, so (1) is NOT SUFFICIENT.

(2) Angles of ABC = Angles of DEF implies that ABC and DEF are similar triangles. But here the area of ABC may or may not be greater than area of DEF.
So, (2) is also NOT SUFFICIENT.

Combining (1) and (2), consider the same examples as we did in statement 1, then again we we don't get a unique answer.

The correct answer is E.
Charged up again to beat the beast :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Mon Feb 28, 2011 7:10 am
jainrahul1985 wrote:Is area of triangle ABC greater than area of triangle DEF ?
1. The value of area of ABC is less than that of perimeter of DEF.
2. Angles of ABC = Angles of DEF

OA E
I received a PM asking me to comment.
Let's plug in familiar triangles that satisfy both statements. The sides of a 45-45-90 triangle are proportioned 1:1:√2.

Statement 1: The value of the area of ABC is less than that of the perimeter of DEF
If ABC = 1:1:√2 (area = 1/2) and DEF = 1:1:√2 (perimeter ≈ 3.4), then the areas are equal.
If ABC = 2:2:2√2 (area = 2) and DEF = 1:1:√2 (perimeter ≈ 3.4), then ABC has a greater area.
Insufficient.

Statement 2: Angles of ABC = Angles of DEF
Since the scenarios used in Statement 1 also satisfy statement 2, and in the first case ABC and DEF have equal areas and in the second case ABC has a greater area, insufficient.

Statements 1 and 2 combined:
Since the scenarios used in Statement 1 satisfy both statements, and in the first case ABC and DEF have equal areas and in the second case ABC has a greater area, insufficient.

The correct answer is E.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1