Similar Triangles – GMAT Geometry

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 beginning, but once you start working with different geometric objects and its shapes, thing will definitely get easier. The...
The Area of an Equilateral Triangle

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 an equilateral triangle as it relates to the length of its side s, and it is as follows: But more likely than not for the...
The 30-60-90 Right Triangle

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 triangle, also known as the isosceles right triangle. There is another so-called “special right triangle” commonly tested on the...
45-45-90 Right Triangle – GMAT Geometry Guide

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 45-45-90, also known as the isosceles right triangle. Know that term, as it could appear by name in a question. As shown...
The 3-4-5 Right Triangle – GMAT Geometry Guide

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 basic relationship, reflected by the Pythagorean Theorem, or a² + b² = c², where a, b, and c match the triangle sides as...