Catch of the Day - C.a.R. - 15 Jan 10

The catch of the day is C.a.R., a math tool


C.a.R. is a dynamic geometry program that simulates compass-and-straightedge constructions on a computer. An intuitive interface makes it easy to do traditional constructions which can later be embedded in a web page, blog or wiki.

Mac Screenshot with Sample Construction

Some of what you can do with C.a.R.:

• Simulation of school geometry in the plane with lots of geometric objects like points, lines, rays, line segments, circles, arcs, angles, polygons and conic sections.
• Dynamical geometry with immediate update of constructions when a basic point is moved. Automatic or manual tracks of points and polar sets of lines.
• Powerful macros.
• Computations in expressions, angle or circle sizes, functions and curves, including computation of integrals, differentials and zeros.
• Flexible ways to format objects, text sizes and stroke, including transparency and background objects, partial or total hiding of objects, configurable name display. The display of objects can be subject to conditions.
• Latex display of formulas and formatted text displays with Greek letters. Substitution of expressions by their values in texts.
• Animation of constructions, or presentation of a construction step by step.

Windows Screenshot with Sample Construction

C.a.R. features an intuitive user interface with context sensitive help and HTML documentation.

Demo Video


C.a.R. works on all modern computer platforms with Java as a local application, with Java Web Start, or as an applet in the browser.. Constructions and assignments can be easily embedded into web pages.

C.a.R. can be used free of charge and the source is available under the GPL license. C.a.R. has been translated in many languages.

DISCLOSURE OF MATERIAL CONNECTION: http://cmp.ly/0