Cinderella

About

Cinderella is interactive geometry software that lets you create and manipulate geometric constructions in an intuitive way. Starting from simple triangle relations, it supports constructions ranging from trigonometric theorems to fractals and transformation groups. Constructions can be exported to the web using CindyJS, and Cinderella is available for free.

The software also includes simulations for virtual laboratories, where you can experiment with masses, springs, charges and fields, and examine scenarios from atom physics and classical mechanics to planetary orbits. Experiments can be sketched with the mouse and run with a simple click. For extending its behavior, Cinderella offers CindyScript, a functional programming language that can be used to plot functions, move objects automatically, and draw custom figures.

Cinderella supports K-12 mathematics as well as projective and hyperbolic geometry, and it is free for students and teachers to use at school and at home. It runs on Windows, macOS, Linux and other Unix variants.