It’s not a single website but a pattern: <username>.github.io/<repository>/geometry-lesson
: Angle at the Center Theorem
Because these sites are hosted on GitHub, they are completely free, open-source, and accessible from any device with a browser. geometry lesson github io
This repository serves as a bridge between pure mathematics and practical implementation. Whether you are building a physics engine or a 2D drawing program, these lessons cover the essential algorithms for geometry processing. It’s not a single website but a pattern: <username>
<div class="controls"> <label>Base: <input type="range" id="baseSlider" min="50" max="250" value="120"></label> <label>Height: <input type="range" id="heightSlider" min="50" max="200" value="100"></label> </div> they are completely free