C.a.R.

This article is about geometry software. For other uses, see car (disambiguation).

C.a.R. (Compass and Ruler), also known as Z.u.L. (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).

C.a.R.
Original author(s)	René Grothmann
Initial release	January 1, 1996 (1996-01-01)
Stable release	20.0 / March 21, 2022; 3 years ago (2022-03-21)
Written in	Java
Operating system	Linux, Microsoft Windows, Mac OS X
Type	Interactive geometry software
License	GNU General Public License
Website	car.rene-grothmann.de/doc_en/index.html

Assignments

Assignments make possible to create Java applets, for a construction exercises. These applets can be used from the command line using the AppletViewer. (Previously, they could be run in a browser, but Java support in browsers has been disabled in recent years.)

See also

• Free and open-source software portal

• GeoGebra
• CaRMetal
• Compass-and-straightedge construction

External links

• C.a.R.
• History of the C.a.R.