One of the less-common but still need-to-know rules tested on the GMAT is the “triangle inequality” rule, which allows you to draw conclusions...
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Similar Triangles – GMAT Geometry
Triangles, and Geometry in general, are something you need to master as much as you can before your GMAT exam. It can seem complicated in the...
Isosceles Triangles and Data Sufficiency
Although we’ve already discussed isosceles triangles a bit during our discussion of 45-45-90 (i.e. isosceles right) triangles, it’s worth...
The Area of an Equilateral Triangle
As promised, we will now connect the 30-60-90 triangle to the equilateral triangle, specifically its area. There is a formula for the area of...
The 5-12-13 and 7-24-25 Right Triangles
By: Rich Zwelling, Apex GMAT Instructor Date: 12th January, 2021 The 5-12-13 and 7-24-25 Right Triangles Although the 3-4-5 right triangle is...
The 30-60-90 Right Triangle
By: Rich Zwelling, Apex GMAT Instructor Date: 7th January, 2021 30-60-90 Right Triangle In a previous piece, we covered the 45-45-90 right...
45-45-90 Right Triangle – GMAT Geometry Guide
By: Rich Zwelling, Apex GMAT Instructor Date: 6th January, 2021 45-45-90 Right Triangle Another of the commonly tested triangles on the GMAT is...
The 3-4-5 Right Triangle – GMAT Geometry Guide
By: Rich Zwelling, Apex GMAT Instructor Date: 17th December, 2020 Right Triangle Identities: 3-4-5 Right triangles always adhere to the same...
A short meditation on GMAT triangles – Read this if you struggle with triangle problems on the GMAT!
GMAT Triangles Close your eyes, imagine a triangle, then open your eyes again. Which of the following did you picture? Something different?...