 | |
 | |
| Original author(s) | René Grothmann |
|---|---|
| Initial release | 1 January 1996 |
| Stable release | 20.0
/ 21 March 2022 |
| Written in | Java |
| Operating system | Linux, Microsoft Windows, Mac OS X |
| Type | Interactive geometry software |
| License | GNU General Public License |
| Website | car |
C.a.R.– Compass and Ruler (also known as Z.u.L., which stands for the German "Zirkel und Lineal") — is a free and open source interactive geometry app that can do geometrical constructions in Euclidean and non-Euclidean geometry. The software is Java based. The author is René Grothmann of the Catholic University of Eichstätt-Ingolstadt. It is licensed under the terms of the GNU General Public License (GPL).