  # GMAT Geometry: Triangles - Video Course Triangles are the most commonly tested geometric figure on the GMAT. It’s important that you know certain GMAT triangle rules, different types and properties of triangles on the GMAT, and perhaps most importantly, the four most commonly-tested GMAT right triangles. You’ll need to know how the GMAT tests triangles on both Problem Solving and Data Sufficiency questions as well, and this video course will teach all of this very effectively and thoroughly.

Lest you think we’re just going to have you memorize a bunch of triangle formulas, however, rest assured that we teach all of the relevant GMAT triangle information in an interactive and engaging way. We’ll teach you how to think through why triangle properties are the way they are, as well as how to remember the sides of the most common right triangles without having to memorize formulas. And as with all of our lessons, we’ll teach you how to avoid common GMAT traps and apply it all to real GMAT questions.

### Specifically, the GMAT video tutorials in this module cover:

• Types of triangles tested on the GMAT;
• Properties of the most common GMAT triangles;
• The Pythagorean Theorem;
• Common right triangles you'll encounter on the GMAT, including the infamous 30-60-90 and 45-45-90 right triangles;
• Right triangle “templates” and the “What is ‘x’?” Game;
• Finding the area of triangles and other triangle rules and formulas;
• Numerous application examples to fully illustrate all of the concepts taught in this course;
• And more!

Oh, and did we mention that this course includes a practice worksheet that will give you the opportunity to apply what you learn to real sample GMAT triangles questions? Each question of the worksheet comes with a detailed video answer explanation showing you the most efficient way to solve it.

So what are you waiting for? Take your GMAT preparation to the next level. Add this course to your library now and prepare to dominate the GMAT!