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

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

Circles

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
Expert replies
by jube » Thu Jun 17, 2010 10:30 am
I was wondering if someone could tell me the formulas/concepts you need to know about circles for GMAT?

Should you be knowing the incircle / circumcircle formulaes? What about equation of a circle?

thanks!
Join the discussion
Source: — Quantitative Reasoning |

by tpr-becky » Thu Jun 17, 2010 12:47 pm
You really only need circumference, area and the relationship between an arc angle and the arc as well as the arc angle and the area of the piece. Circles are all about finding a HELPFUL radius on the GMAT.
Becky
Master GMAT Instructor
The Princeton Review
Irvine, CA
Join the discussion

by jube » Fri Jun 18, 2010 7:54 am
tpr-becky wrote:You really only need circumference, area and the relationship between an arc angle and the arc as well as the arc angle and the area of the piece. Circles are all about finding a HELPFUL radius on the GMAT.
thanks Becky!
Join the discussion