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

 It is currently 06 May 2015, 08:38

# Right Now:

Darden is releasing R3 decisions: Check your profile status    |    EXPECTING SOON - Stanford  and  Fuqua   |   Join Chat Room for Live Updates

### 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

# If the length of side AB is 17, is triangle ABC a right

Author Message
TAGS:
Manager
Joined: 26 Dec 2007
Posts: 70
Followers: 1

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

If the length of side AB is 17, is triangle ABC a right [#permalink]  13 Jan 2008, 14:40
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
If the length of side AB is 17, is triangle ABC a right triangle?

(1) The length of side BC is 144.

(2) The length of side AC is 145.

Manager
Joined: 04 Jan 2008
Posts: 85
Followers: 1

Kudos [?]: 10 [0], given: 0

Re: DS - Properties of Triangles [#permalink]  13 Jan 2008, 17:52
We are given just length of one side=17
S1 gives another side, so we can make any triangle with it. sides need not be integer values. so S1 not suffi.

S2 not suffi for same reasons as above

But, taking S1 and S2, we have all three sides of a triangle & using Pythagorean theorem we can see if it is a right triangle.
OA??
Director
Joined: 09 Jul 2005
Posts: 595
Followers: 2

Kudos [?]: 26 [0], given: 0

Re: DS - Properties of Triangles [#permalink]  14 Jan 2008, 07:57
Answer should be C. I followed the same reasoning as Dellin did.
Intern
Joined: 13 Dec 2007
Posts: 29
Followers: 0

Kudos [?]: 4 [0], given: 0

Re: DS - Properties of Triangles [#permalink]  14 Jan 2008, 10:10
Reasoning above is correct, Answer should be C
VP
Joined: 22 Nov 2007
Posts: 1105
Followers: 7

Kudos [?]: 193 [0], given: 0

Re: DS - Properties of Triangles [#permalink]  14 Jan 2008, 10:15
I see 1 and 2 are both insuff by theirselves. together: in order for the triangle to be rectangle we must have ab^2 + bc^2 = ac^2, where obviously ac must be the hypothenuse because it is greatest side. then we know that 145^145=21025. 17^2= 289 and 144^144=20736. 20736+289=21025, then OA is C. anyway, without doing any kind of calculus, by 1 and 2 we would know that it is possible to figure out whether ab^2 + bc^2 = ac^2, so c is suff
Manager
Joined: 26 Dec 2007
Posts: 70
Followers: 1

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

Re: DS - Properties of Triangles [#permalink]  14 Jan 2008, 12:31

OA is C
SVP
Joined: 04 May 2006
Posts: 1936
Schools: CBS, Kellogg
Followers: 19

Kudos [?]: 442 [1] , given: 1

Re: DS - Properties of Triangles [#permalink]  14 Jan 2008, 20:29
1
KUDOS
marcodonzelli wrote:
I see 1 and 2 are both insuff by theirselves. together: in order for the triangle to be rectangle we must have ab^2 + bc^2 = ac^2, where obviously ac must be the hypothenuse because it is greatest side. then we know that 145^145=21025. 17^2= 289 and 144^144=20736. 20736+289=21025, then OA is C. anyway, without doing any kind of calculus, by 1 and 2 we would know that it is possible to figure out whether ab^2 + bc^2 = ac^2, so c is suff

I'm very lazy, I see that the last digit of the square of 17 plusing the last digit of square of 144 produces a number that ends 5, which is the same as the last digit of square of 145. I conclude that ABC is right triangle at B. So I choose C

Is there any problem with my reasoning?
_________________
Re: DS - Properties of Triangles   [#permalink] 14 Jan 2008, 20:29
Similar topics Replies Last post
Similar
Topics:
1 The sides of right triangle ABC are such that the length of 2 12 Mar 2013, 04:13
5 The side lengths of triangle ABC are such that AC > BC > AB. 8 11 Mar 2013, 14:13
1 If the length of side AB is 17, is triangle ABC a right tria 13 05 Feb 2012, 03:13
1 If the length of side AB is 17, is triangle ABC a right 7 13 Oct 2009, 05:39
If the length of side AB is 17, is triangle ABC a right 12 24 Jul 2007, 18:06
Display posts from previous: Sort by