triangles

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divya23: Master | Next Rank: 500 Posts; Posts: 113; Joined: Mon Apr 26, 2010 8:58 amFollowed by: 14 members; Thanked: 2 times

by divya23 » Mon Jun 06, 2011 10:59 am

if 2 sides are of lenth 2 and 5 find perimeter
9
15
19
none
[spoiler]ans = none[/spoiler]

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Source: Beat The GMAT — Problem Solving | Mon Jun 06, 2011 10:59 am

Frankenstein: Legendary Member; Posts: 1448; Joined: Tue May 17, 2011 9:55 amFollowed by: 53 members; Location: India; Thanked: 375 times

by Frankenstein » Mon Jun 06, 2011 11:03 am

Hi,
With this info. we can't find the third side. So we cant find the perimeter.

Cheers!

Things are not what they appear to be... nor are they otherwise

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MBA.Aspirant: Master | Next Rank: 500 Posts; Posts: 401; Joined: Tue May 24, 2011 1:14 amFollowed by: 5 members; Thanked: 37 times

by MBA.Aspirant » Mon Jun 06, 2011 11:17 am

divya23 wrote:if 2 sides are of lenth 2 and 5 find perimeter
9
15
19
none
[spoiler]ans = none[/spoiler]

The only things you can tell from this info. is that the third side of the triangle is between 3 and 7, 3 < x < 7, because of the rule that says the third side of the triangle has to be less than the sum of the other two sides, and more than their difference.

Thus the perimeter has to be between 2+5+3 < p < 2+5+7 i.e 10 < p < 14

Since none of the values stated fall within this range, the answer is none.

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cans: Legendary Member; Posts: 1309; Joined: Mon Apr 04, 2011 5:34 amFollowed by: 123 members; Location: India; Thanked: 310 times; GMAT Score:750

by cans » Mon Jun 06, 2011 4:43 pm

2 lengths are given.
Insufficient information
IMO none

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kartik005: Newbie | Next Rank: 10 Posts; Posts: 1; Joined: Mon Mar 15, 2010 12:02 pm

by kartik005 » Tue Jun 07, 2011 12:47 pm

The answer is none because there is a concept in traingles which states that "the sum of any two sides of a triangle should be greater than the third side", so since perimeter is given we can find out the third side and none of the answer choice fulfills our criteria.

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[email protected]: Legendary Member; Posts: 934; Joined: Tue Nov 09, 2010 5:16 amFollowed by: 14 members; Location: AAMCHI MUMBAI LOCAL; Thanked: 63 times

by [email protected] » Wed Jun 08, 2011 8:27 pm

Insufficient Information Hence None

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bubbliiiiiiii: Legendary Member; Posts: 979; Joined: Tue Apr 14, 2009 1:38 amFollowed by: 12 members; Location: Hyderabad, India; Thanked: 49 times; GMAT Score:700

by bubbliiiiiiii » Thu Jun 09, 2011 12:36 am

MBA.Aspirant has put it nicely.

Answer is none.

Regards,

Pranay

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