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

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

BTG quistion

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
Legendary Member
Posts: 759
Joined: Mon Apr 26, 2010 10:15 amFollowed by: 3 members
Thanked: 85 times

by clock60 » Sun May 15, 2011 3:14 am
hi i hope that the answer is D
second st is easier
(2)if x=60, then angle BCD=120, and angle CBD=30, thus triangle BCD is isosceles. and BC=6.
so suff
(1) with brute force, if you know 2 sides of triangle and angle between them. you can calculate the last side using cosine theorem, no need to calculate, but simply to know
BC^2=CD^2+BD^2-2*CD*BD*cos30, now know that BD=6*3^1/2, CD=6, and cos 30 is fixed value ((3^1/2)/2)
so you can find BC
also suff
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Senior | Next Rank: 100 Posts
Posts: 57
Joined: Tue Apr 19, 2011 7:39 pmFollowed by: 2 members
Location: Singapore
Thanked: 6 times

by abhi0697 » Sun May 15, 2011 9:34 pm
Agree with D
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 516
Joined: Mon Nov 02, 2009 6:42 amFollowed by: 1 member
Location: Mumbai
Thanked: 14 times
GMAT Score:710

by ankurmit » Mon May 16, 2011 7:10 am
clock60 wrote:hi i hope that the answer is D
second st is easier
(2)if x=60, then angle BCD=120, and angle CBD=30, thus triangle BCD is isosceles. and BC=6.
so suff
(1) with brute force, if you know 2 sides of triangle and angle between them. you can calculate the last side using cosine theorem, no need to calculate, but simply to know
BC^2=CD^2+BD^2-2*CD*BD*cos30, now know that BD=6*3^1/2, CD=6, and cos 30 is fixed value ((3^1/2)/2)
so you can find BC
also suff
thanks
--------
Ankur mittal
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1