Last visit was: 26 Mar 2025, 09:57 It is currently 26 Mar 2025, 09:57
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.
Close
Request Expert Reply
Confirm Cancel
User avatar
mikemcgarry
User avatar
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Last visit: 06 Aug 2018
Posts: 4,482
Own Kudos:
29,757
 [15]
Given Kudos: 130
Expert
Expert reply
Posts: 4,482
Kudos: 29,757
 [15]
3
Kudos
Add Kudos
12
Bookmarks
Bookmark this Post
User avatar
Archit143
Joined: 21 Sep 2012
Last visit: 20 Sep 2016
Posts: 723
Own Kudos:
Given Kudos: 70
Status:Final Lap Up!!!
Affiliations: NYK Line
Location: India
GMAT 1: 410 Q35 V11
GMAT 2: 530 Q44 V20
GMAT 3: 630 Q45 V31
GPA: 3.84
WE:Engineering (Transportation)
Kudos
Add Kudos
Bookmarks
Bookmark this Post
avatar
abhinav11
Joined: 04 Sep 2012
Last visit: 02 Apr 2016
Posts: 115
Own Kudos:
Given Kudos: 27
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
ronr34
Joined: 08 Apr 2012
Last visit: 10 Oct 2014
Posts: 252
Own Kudos:
Given Kudos: 58
Posts: 252
Kudos: 246
Kudos
Add Kudos
Bookmarks
Bookmark this Post
abhinav11
mikemcgarry
Trapezoid JKLM in the x-y plane has coordinates J = (–2, –4), K = (–2, 1), L = (6, 7), and M = (6, –4). What is its perimeter?

(A) 34
(B) 36
(C) 38
(D) 40
(F) 42


For a discussion of how to handle with elegance both this question and distance in the x-y plane in general see this post. Other experts, feel free to share any other insights about elegance in x-y plane problems.


Is there any shortcut to these type of questions than just calculating distance between two points and then adding all of them, that seems bit of time killer for me. But if we dont have any alternative we have to follow the approach.

Regards,
Abhinav

I think all sides are pretty straight forward. The only side that needs calculation is the one that is not parallel to the axis (y and x)
and it can be found using the triangle formula (draw a triangle that originates in the vertices to the base.)
you get 10+8+5+11=34
User avatar
mikemcgarry
User avatar
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Last visit: 06 Aug 2018
Posts: 4,482
Own Kudos:
29,757
 [2]
Given Kudos: 130
Expert
Expert reply
Posts: 4,482
Kudos: 29,757
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
abhinav11
mikemcgarry

For a discussion of how to handle with elegance both this question and distance in the x-y plane in general see this post. Other experts, feel free to share any other insights about elegance in x-y plane problems.

Is there any shortcut to these type of questions than just calculating distance between two points and then adding all of them, that seems bit of time killer for me. But if we dont have any alternative we have to follow the approach.

Regards,
Abhinav
Dear Abhinav,
The reason I posted this problem was precisely to demonstrate that an elegant solution was possible. Please follow the link given in the problem to a page that demonstrates this elegant time-saving solution.
Mike :-)
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 36,710
Own Kudos:
Posts: 36,710
Kudos: 963
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Moderators:
Math Expert
100090 posts
PS Forum Moderator
511 posts