It is currently 18 Nov 2017, 13:10

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Gmat Prep- Triangles

Author Message
Intern
Joined: 21 Sep 2005
Posts: 12

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

Location: California

### Show Tags

11 Jul 2006, 21:11
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Ok, need some help. problem appeared on second gmat prep test

two triangles. the area of the triangle on the right (call her t1) is twice the area of that on the left (call him t2). In terms of b1, b2 equals....
area of triangle= 1/2 bh
the correct answer is (sqrt2) (b1), but i have no clue how they got it and am creating major voodoo. thanks, guys!

dg
_________________

"Become who you are."-Pope John Paul II

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

Senior Manager
Joined: 29 Jun 2005
Posts: 403

Kudos [?]: 22 [1], given: 0

### Show Tags

11 Jul 2006, 22:03
1
KUDOS
The 2 triangles are proportional, which means that the ratios of respective sides of triangle are equal.
Lets assume the sides of smaller triangle a, b, c. The sides of a bigger one is A, B, C respectively.
since they are proportional, a/A=b/B=c/C=> A=x*a, B=x*b, C=x*c
the area of small triangle is 1/2a*b*sin(Y)
the area of big triangle is 1/2A*B*sin(Y)=a*b*sin(Y)=>A*B=2a*b=>
x*a*x*b=2a*b ----> x^2ab=2ab --->x=sqrt(2).

Kudos [?]: 22 [1], given: 0

11 Jul 2006, 22:03
Display posts from previous: Sort by

# Gmat Prep- Triangles

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.