Find all School-related info fast with the new School-Specific MBA Forum

It is currently 25 Nov 2014, 20:17

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If the area of traingleular region RST is 25, what is the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 05 Sep 2007
Posts: 146
Location: New York
Followers: 1

Kudos [?]: 12 [0], given: 0

If the area of traingleular region RST is 25, what is the [#permalink] New post 30 Oct 2007, 10:40
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
If the area of traingleular region RST is 25, what is the perimetr of RST?

1. The lenght of one side of RST is 5sq of 2
2.RST is the right isosceles triangle.
Manager
Manager
User avatar
Joined: 02 Aug 2007
Posts: 146
Followers: 1

Kudos [?]: 11 [0], given: 0

 [#permalink] New post 30 Oct 2007, 10:54
1) INSUFF
We don't which side is 5 sqrt(2)
2) INSUFF
Even though that tells us the triangle has 2 equal sides and a right angle. There are numerous combinations that give us the triangle area of 25.

Together:
C. Sufficient

1) gives a side
2) tells us that two sides are equal, so base = height

Since 5 sqrt(2) cannot be the base & height with area 25, this is the hypotenuse.

Incorrect, see correct answer below.

Last edited by yuefei on 30 Oct 2007, 11:05, edited 1 time in total.
Director
Director
avatar
Joined: 11 Jun 2007
Posts: 932
Followers: 1

Kudos [?]: 57 [0], given: 0

Re: DS-Geometry [#permalink] New post 30 Oct 2007, 11:03
el1981 wrote:
If the area of traingleular region RST is 25, what is the perimetr of RST?

1. The lenght of one side of RST is 5sq of 2
2.RST is the right isosceles triangle.


i get B

since we know that RST is both a right triangle and isosceles, we can determine that both the base and the height is 5, and using the Pythagorean Thm, we can establish that the hypotenuse is 5sqt 2

so the perimeter must be 10 + 5sqrt 2
Manager
Manager
avatar
Joined: 05 Sep 2007
Posts: 146
Location: New York
Followers: 1

Kudos [?]: 12 [0], given: 0

Re: DS-Geometry [#permalink] New post 30 Oct 2007, 15:10
beckee529 wrote:
el1981 wrote:
If the area of traingleular region RST is 25, what is the perimetr of RST?

1. The lenght of one side of RST is 5sq of 2
2.RST is the right isosceles triangle.


i get B

since we know that RST is both a right triangle and isosceles, we can determine that both the base and the height is 5, and using the Pythagorean Thm, we can establish that the hypotenuse is 5sqt 2

so the perimeter must be 10 + 5sqrt 2

beckee, how exactly did you determine that both the base and the height is 5. Please elaborate.
Intern
Intern
avatar
Joined: 09 Jun 2005
Posts: 32
Followers: 0

Kudos [?]: 0 [0], given: 0

 [#permalink] New post 31 Oct 2007, 06:59
Given: Area of Triangle is 25, so 1/2 Base*Height = 25

Base*height =50

Stmt1: Length of one side can be any side of triangle so cannot be subsitituted in the above euqation. InSuff to find perimeter.

Stmt2: Rightangle isosceles triangle. Hence side is of ratio 1:1:Sqrt(2)
From this you have one value for base. solve for height. Sufficient

Answer B
  [#permalink] 31 Oct 2007, 06:59
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic What is the area of the shaded region? joshoowa 2 01 Mar 2014, 19:44
14 Experts publish their posts in the topic What is the area of rectangular region R ? ajit257 18 26 Nov 2010, 12:55
What is the area of rectangular region R? priyanka116 2 29 Jul 2010, 13:05
Experts publish their posts in the topic If the area of triangular region RST is 25, what is the prasannar 14 21 May 2008, 01:53
What is the area of the rectangular region? PICTURE: jimmyjamesdonkey 5 28 Oct 2007, 10:30
Display posts from previous: Sort by

If the area of traingleular region RST is 25, what is the

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.