See if it's really true, and then prove it! They have two equal sides, but what about their angles? In triangles, sides and their opposite angles are related! 4. Triangle congruence and similarity. Use …

Learn geometry—angles, shapes, transformations, proofs, and more.

These lessons help you brush up on important math topics and prepare you to dive into skill practice! Learn Geometry skills for free! Choose from hundreds of topics including transformations, …

Geometry is all about shapes and their properties. If you like playing with objects, or like drawing, then geometry is for you!

In my free geometry lessons, we’ll break everything down from calculating the area and volume of shapes to measuring angles, understanding conditional statements, and of course, mastering the …

This Geometry math course is divided into 10 chapters and each chapter is divided into several lessons. Under each lesson you will find theory, examples and video lessons.

This site contains high school Geometry lessons on video from four experienced high school math teachers. There are also packets, practice problems, and answers provided on the site.

Free geometry lessons for students covering triangles, circles, angles, and area formulas. Interactive worksheets and calculators included. Learn now!"

Dec 28, 2025 · Enhance your geometric knowledge with interactive lessons, tutorials, and problem-solving resources. Discover the beauty and logic behind shapes, angles, theorems, and more.

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 …