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 →

Gprep Question - Isosceles

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 708
Joined: Sun Jun 01, 2008 4:59 amFollowed by: 1 member
Location: USA
Thanked: 13 times
by niraj_a » Fri Jun 06, 2008 4:13 am
Hi I need help with the attached question. If someone could explain the logic GMAC used to pick answer A I would appreciate it.

I understand the 2x+y=180 equation that can be used to solve this, where x are the two smaller equal angles, but how can we know that angle S is x for Statement 2?

Thank you!
Attachments
GMATPrep Practice 1 Math - Isosceles.doc
(69.5 KiB) Downloaded 152 times
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
Legendary Member
Posts: 708
Joined: Sun Jun 01, 2008 4:59 amFollowed by: 1 member
Location: USA
Thanked: 13 times

by niraj_a » Fri Jun 06, 2008 6:27 am
anyone?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 4
Joined: Wed Apr 16, 2008 1:58 am

by jjw.ashish » Fri Jun 06, 2008 7:06 am
Statement 1 alone is sufficient because if one angle is 100 deg it cannot be forming the equal side because that would make the sum of two angles to 200 deg (more than the sum of angles of a triangle).

That leaves the two other angles to be isoceles. Sum = 80 (180 -100)
Hence individual angles is 40 deg
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 708
Joined: Sun Jun 01, 2008 4:59 amFollowed by: 1 member
Location: USA
Thanked: 13 times

by niraj_a » Fri Jun 06, 2008 7:20 am
that makes perfect sense, i don't know why i didn't think of it on those lines, making me to pick D.

thank you so much!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 14
Joined: Fri Apr 04, 2008 11:28 pm

by sasi78 » Sat Jun 07, 2008 9:54 am
I feel, good understanding of the properties of different types of triangles suchs as isoceles & equilateral is must to answer this kind of quesitons.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1