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]

Welcome to —where we stop guessing and start building. The Static Problem Traditional geometry lessons have a fatal flaw: they don’t move. geometry-lesson.github

You can’t grab a triangle and stretch its vertices to see if the angles still add up to 180°. You can’t rotate a 3D solid to see why the volume formula works. You’re expected to memorize, not manipulate. Drag the vertex

Why Your Geometry Textbook Lies (And How GitHub Can Fix It) We’ll cover that next week

Geometry Lesson Hub Reading time: 4 minutes

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