Last Updated on September 14, 2023
C.a.R. is a dynamic geometry program simulating compass and ruler constructions.
C.a.R. means Compass and Ruler and is about constructions with a pair of compasses and a straight edge (ruler). The software is ideal for basic constructions but it also makes it possible to build very complex geometrical figures.
This software is intended to be used in schools and universities. It provides a rich graphical interface, with web export, graphics export, macros, assignments, animations and more. There is a comprehensive online help feature.
- Ruler and compass constructions can be changed by dragging one of the basic construction points. The student can check the correctness of the construction and gain new insights.
- Tracks of points and animated constructions can help to understand geometric relations. Tracks can be used as new objects to explore.
- With the macros of C.a.R. very complicated constructions become possible. Macros are also a good way to organize the geometric thinking.
- Hiding construction details and using colors make constructions clearer to read. In C.a.R., lines and circles can also be reduced to the relevant points.
- Arithmetic computations, numerical solutions, curves and functions go beyond classical constructions.
- Construct in 3D using advanced macros.
- Other geometries, hyperbolic or elliptic, can be explored.
Developer: Rene Grothman
License: GNU General Public License v2.0
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