Geometry-lesson.github ((top)) Access

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]

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

Geometry Lesson Hub Reading time: 4 minutes Drag the vertex

If you’ve ever tried to learn geometry from a static PDF or a dusty textbook, you know the struggle. You stare at a triangle on page 142, squint at the dotted lines, and wonder: "Does angle C really look like that? Or did the printer run out of ink?" squint at the dotted lines