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

 It is currently 03 May 2015, 06:54

### 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

# A right triangle has sides of lengths a and 2b and

Author Message
TAGS:
Manager
Joined: 18 Nov 2006
Posts: 125
Followers: 1

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

A right triangle has sides of lengths a and 2b and [#permalink]  04 Dec 2006, 11:35
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A right triangle has sides of lengths a and 2b and hypotenuse of length a+b. whats the perimeter ?
1)a=3
2)a=3b/2

guys, take as less time as pos, while trying this..and let's see the answers!
Director
Joined: 28 Dec 2005
Posts: 922
Followers: 2

Kudos [?]: 37 [0], given: 0

getting A

a^2+(2b)^2 = (a+b) ^2 from q which gives us a = 3b/2 or b = 0.

From 1 if a = 3, then b can be found

From 2: repeats what is in the question
Senior Manager
Joined: 01 Sep 2006
Posts: 302
Location: Phoenix, AZ, USA
Followers: 1

Kudos [?]: 15 [0], given: 0

Re: DS: make a silly mistake here! [#permalink]  04 Dec 2006, 12:01
A right triangle has sides of lengths a and 2b and hypotenuse of length a+b. whats the perimeter ?
1)a=3
2)a=3b/2

we know for rt triangle side^2+side1^2=hypo^2

a^2+4b^2=(a+b)^2=a^2+b^2+2ab

4b^2=b^2+2ab
3b=2a

Peimeter = a +2b+a+b= 2a+3b=2a+2a=4a

(1) gives value of A

Suff

(2) Gives info that could be derived insuff
Intern
Joined: 14 Nov 2006
Posts: 15
Followers: 0

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

Re: DS: make a silly mistake here! [#permalink]  04 Dec 2006, 12:05
Damager wrote:
A right triangle has sides of lengths a and 2b and hypotenuse of length a+b. whats the perimeter ?
1)a=3
2)a=3b/2

we know for rt triangle side^2+side1^2=hypo^2

a^2+4b^2=(a+b)^2=a^2+b^2+2ab

4b^2=b^2+2ab
3b=2a

Peimeter = a +2b+a+b= 2a+3b=2a+2a=4a

(1) gives value of A

Suff

(2) Gives info that could be derived insuff

Ur right, I didn't simplify the equation!

A it is
Manager
Joined: 18 Nov 2006
Posts: 125
Followers: 1

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

OA [#permalink]  04 Dec 2006, 12:33
OA : A

great going guys!

3 out of 4 avoided the silly mistake !

I will have to give better ones next time!
Manager
Joined: 25 Nov 2006
Posts: 60
Followers: 2

Kudos [?]: 2 [0], given: 0

Option A looks fine Sufficient to answer because we already have a relation between Rt triangle.i.e hypo^2=base^2+Altitude^2.
Similar topics Replies Last post
Similar
Topics:
16 A certain right triangle has sides of length x, y, and z, wh 2 13 Mar 2014, 01:22
1 The sides of right triangle ABC are such that the length of 2 12 Mar 2013, 04:13
28 A certain right triangle has sides of length x, y, and z 15 16 Jan 2011, 15:01
24 A certain right triangle has sides of length x, y, and z 15 17 Jan 2010, 01:39
1 A certain right triangle has sides of length x, y, and z, 7 07 Sep 2008, 07:15
Display posts from previous: Sort by