• Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

    MORE DETAILS
    Veritas Prep
  • Target Test Prep
    5-Day Free Trial
    5-day free, full-access trial TTP Quant

    Available with Beat the GMAT members only code

    MORE DETAILS
    Target Test Prep
  • EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • examPAL
    Most awarded test prep in the world
    Now free for 30 days

    Available with Beat the GMAT members only code

    MORE DETAILS
    examPAL
  • e-gmat Exclusive Offer
    Get 300+ Practice Questions
    25 Video lessons and 6 Webinars for FREE

    Available with Beat the GMAT members only code

    MORE DETAILS
    e-gmat Exclusive Offer
  • Varsity Tutors
    Award-winning private GMAT tutoring
    Register now and save up to $200

    Available with Beat the GMAT members only code

    MORE DETAILS
    Varsity Tutors
  • PrepScholar GMAT
    5 Day FREE Trial
    Study Smarter, Not Harder

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • Kaplan Test Prep
    Free Practice Test & Review
    How would you score if you took the GMAT

    Available with Beat the GMAT members only code

    MORE DETAILS
    Kaplan Test Prep
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

    MORE DETAILS
    Magoosh
  • Economist Test Prep
    Free Trial & Practice Exam
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test Prep

In triangle ABC, side AB is 5 inches. . .

This topic has 1 expert reply and 0 member replies

In triangle ABC, side AB is 5 inches. . .

Post Mon Sep 25, 2017 5:56 pm
In triangle ABC, side AB is 5 inches and side BC is 7 inches. What is the area of the triangle ABC?

(1) Angle ABC is 90 degrees
(2) Triangle ABC is a right triangle

The OA is A.

Why the statement (2) is not sufficient too? Both statements says almos the same. What is the difference?

  • +1 Upvote Post
  • Quote
  • Flag

GMAT/MBA Expert

ErikaPrepScholar Master | Next Rank: 500 Posts
Joined
20 Jul 2017
Posted:
414 messages
Followed by:
5 members
Upvotes:
86
GMAT Score:
770
Most Active Expert Most Responsive Expert
Post Tue Sep 26, 2017 8:43 am
The trap in this question is that the test makers want you to think that the two statements say the same thing. But they actually don't!

Statement 1 tells us that Angle ABC is 90 degrees. This means that AB and BC are the base and height of the triangle and that AC is the hypothenuse. So to get the area, we use A = (1/2)bh = 1/2(5)(7). SUFFICIENT.

Statement 2 tells us that Triangle ABC has a 90 degree angle. However, it doesn't tell us which angle is 90 degrees: it could be ABC, ACB, or BAC. This means that we don't know if AB and BC are the base and height of the triangle. They might be! But AB could be the base and BC could be the hypotenuse. This would mean that the height of the triangle would *not* be 7, which would then change the area of the triangle. INSUFFICIENT.

_________________


Erika John - Content Manager/Lead Instructor
https://gmat.prepscholar.com/gmat/s/

Get tutoring from me or another PrepScholar GMAT expert: https://gmat.prepscholar.com/gmat/s/tutoring/

Learn about our exclusive savings for BTG members (up to 25% off) and our 5 day free trial

Check out our PrepScholar GMAT YouTube channel, and read our expert guides on the PrepScholar GMAT blog

  • +1 Upvote Post
  • Quote
  • Flag

Best Conversation Starters

1 lheiannie07 108 topics
2 Roland2rule 63 topics
3 ardz24 63 topics
4 LUANDATO 52 topics
5 Vincen 50 topics
See More Top Beat The GMAT Members...

Most Active Experts

1 image description GMATGuruNY

The Princeton Review Teacher

144 posts
2 image description Jeff@TargetTestPrep

Target Test Prep

115 posts
3 image description Rich.C@EMPOWERgma...

EMPOWERgmat

111 posts
4 image description Scott@TargetTestPrep

Target Test Prep

101 posts
5 image description Max@Math Revolution

Math Revolution

87 posts
See More Top Beat The GMAT Experts