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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Plot it on an XY plane, calculate each side (X2-X1), (X3-X2) etc.

Once you have 3 sides (a,b,c), then the area is calculated using

A = sqrt(s(s-a)(s-b)(s-c)) where s = (a+b+c)/2

Often, these questions can be far simpler too. When you plot it on the XY plane, see if you can get the height and the base (from any orientation), if you have that - just do

(1/2)*base*height

for the answer.

The key here is to do a quick plot of the triangle on an XY plane. _________________

In such a case, the answers might help. Aren't there any choices? What is the source of the question?

The semi-perimeter s = 4 + 1.5sqrt(10)
The area is sqrt (6.5*13.75) using the formula sqrt[s(s-a)(s-b)(s-c)]

I am not sure if such complex calculations would be asked in the GMAT. Plotting the triangle helps to an extent. However with the given coordinates altitudes and bases are difficult to detemine. _________________

I remember doing a question from the GMAT Prep test involving vertices, which flustered me. So I went looking for help. I found the example given in this thread on a math forum while looking for that help.

I found out how to solve the problem using 3x3 determinants but it is to confusing and hard to share at this moment. Perhaps I can show the technique using illustrator when I have time later this evening.

Yes, the answer is 8 and I got it by using a really simple technique:
what I did was just drawing a triangle and then inscribing it inside a rectangle with the vertices (-2;3)(3;3)(3;-4)(-2;-4). Now, it's pretty simple to find the area of the rectangle with sides 5 and 7, it's 35. Then I just substructed from this the 'extra' bits and pieces (three right triangles and a rectangle): 35-2-6-1.5-17.5=8
Huh?

Hello everyone! Researching, networking, and understanding the “feel” for a school are all part of the essential journey to a top MBA. Wouldn’t it be great... ...

Are you interested in applying to business school? If you are seeking advice about the admissions process, such as how to select your targeted schools, then send your questions...