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#### similar triangles

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 Post subject: similar triangles  Posted: Sun Jul 01, 2012 12:39 pm
 Course Students

Posts: 32
 i noticed in the MGMAT guide when it was describing similar triangles that you could also have similar parallelograms, hexagon, etc. They also mention that it doesnt have to be sides that you compare for the similar triangle rule. It could be perimeter or heights, can someone please explain or point me to an example using perimeter or height?

 Post subject: Re: similar triangles  Posted: Tue Jul 03, 2012 7:58 am
 ManhattanGMAT Staff

Posts: 4410
Location: Southwest Airlines, seat 21C
 there is too much ambiguity in the rule you quote for us to be able to help you with an example. can you quote the exact rule from the book (with page number) that you are referring to? _________________Tim SandersManhattan GMAT Instructor

 Post subject: Re: similar triangles  Posted: Thu Jul 05, 2012 9:07 pm
 Course Students

Posts: 32
 p 33 Chpt 2 of Geometry Strategy guide at the bottom. Thanks!

 Post subject: Re: similar triangles  Posted: Fri Jul 06, 2012 8:26 am
 ManhattanGMAT Staff

Posts: 4410
Location: Southwest Airlines, seat 21C
 [the page number refers to the 4th edition guide, for the benefit of other students reading this]once you know the ratio of corresponding sides in two similar figures, that ratio will apply to any linear dimension. for instance, if you have two equilateral triangles where side lengths are in a ratio of 1:2, and the smaller one has height 5root3, then the larger one will have height 10root3. or if the larger one has perimeter 60, the smaller one will have perimeter 30.. _________________Tim SandersManhattan GMAT Instructor

 Post subject: Re: similar triangles  Posted: Fri Jul 27, 2012 7:34 am
 Forum Guests

Posts: 8
 Similar triangle means riangles are similar if they have the same shape, but can be different sizes.

 Post subject: Re: similar triangles  Posted: Fri Jul 27, 2012 8:05 am
 ManhattanGMAT Staff

Posts: 4410
Location: Southwest Airlines, seat 21C
 thanks? _________________Tim SandersManhattan GMAT Instructor

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