Geometry-lesson.github __hot__ May 2026

Have a geometry concept that always tripped you up? Reply in the comments—we’ll build an interactive lesson for it.

Head over to (or check the repository on GitHub). Clone it, break it, fix it. And the next time someone tells you that the sum of the angles in a triangle is 180°, don't just nod. geometry-lesson.github

Why Your Geometry Textbook Lies (And How GitHub Can Fix It) Have a geometry concept that always tripped you up

Geometry Lesson Hub Reading time: 4 minutes geometry-lesson.github

Drag the vertex. Prove them wrong. (Spoiler: On a sphere, it’s more than 180°. We’ll cover that next week.) 👉 [Visit the Live Demo] 👉 [Star us on GitHub]