Start exploring geometry with an intuitive introduction to the essentials.

20 Lessons

Discover how intuitive geometry can be when you keep your assumptions simple and use your own logic and reasoning to set up your calculations.

This fundamentals course will introduce you to angle axioms, perimeter and area calculation strategies, coordinate geometry, 3D geometry, and more. This is the course that you should begin with if you're just starting your exploration of geometry on Brilliant.

- Angle Axioms
- Measuring Areas
- Parallel and Perpendicular Lines
- Perimeter
- Similarity
- Surface Area
- The Pythagorean Theorem
- Three-Dimensional Figures
- Volume