C.a.R.– Compass and Ruler (also known as Z.u.L., which stands for the
German
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* Germany (of or related to)
**Germania (historical use)
* Germans, citizens of Germany, people of German ancestry, or native speakers of the German language
** For citizens of Germany, see also German nationality law
**Ger ...
"Zirkel und Lineal") — is a free and open source
interactive geometry app that can do geometrical constructions in
Euclidean and
non-Euclidean geometry
Geometry (; ) is, with arithmetic, one of the oldest branches of mathematics. It is concerned with properties of space such as the distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is c ...
.
The software is
Java
Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
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
The GNU General Public License (GNU GPL or simply GPL) is a series of widely used free software licenses that guarantee end user
In product development, an end user (sometimes end-user) is a person who ultimately uses or is intended to ulti ...
(GPL).
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
*
Graphmatica
*
GeoGebra
*
CaRMetal
*
Compass-and-straightedge construction
In geometry, straightedge-and-compass construction – also known as ruler-and-compass construction, Euclidean construction, or classical construction – is the construction of lengths, angles, and other geometric figures using only an Idealiz ...
External links
C.a.R. History of the C.a.R.
Free educational software
Free interactive geometry software
Java platform software
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