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About Cabri Geometry II
Cabri Geometry II lets you construct and explore geometric objects interactively.
Jean-Marie Laborde and Franck Bellemain developed Cabri Geometry II at the Institut
d'Informatique et Mathématiques Appliquées de Grenoble (IMAG), a research lab at the Université
Joseph Fourier in Grenoble, France, in cooperation with the Centre National de la Recherche
Scientifique (CNRS) and Texas Instruments.
Texas Instruments, the publisher for Cabri Geometry II in the United States and Canada, is pleased
to bring computer-based geometry to classrooms. The geometric foundation of this easy-to-use
software encourages exploring and conjecturing—from simple shapes to advanced projective and
hyperbolic geometry.
About the Developers
Jean-Marie Laborde is founder and Research Director of Laboratoire de Structures Discrètes et de
Didactique (LSD2), a research laboratory within IMAG. He graduated in mathematics at Ècole
Normale Supérieure in Paris in 1969. He earned a Ph.D. (Thèse d'État) in computer science at the
University of Grenoble in 1977. Jean-Marie began work on the Cabri II project in 1981 as an
environment for graph theory. He has devoted his research efforts to the use of geometric methods
for the study of different classes of graphs, especially hypercubes.
Franck Bellemain earned a Ph.D. in mathematics at the Université Joseph Fourier in 1992. He
began work on the Cabri II project in 1986 and is responsible for writing several versions of the
software for Macintosh, PC-compatible, and Japanese computers. His research and thesis have
been devoted to the use of technology in the classroom.
Cabri Geometry II Features
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Includes interactive analytic, transformational, and Euclidean geometry.
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Allows intuitive construction of points, lines, triangles, polygons, circles, and other basic
objects.
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Translates, dilates, and rotates geometric objects around geometric centers or specified points
plus reflection, symmetry, and inverse of the objects.
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Constructs conics easily, including ellipses and hyperbolas.
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Explores advanced concepts in projective and hyperbolic geometry.
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Annotates and measures figures (with automatic updating).
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Uses both Cartesian and polar coordinates.
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Provides for user display of the equations of geometric objects, including lines, circles,
ellipses, and coordinates of points.
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Allows the user to create macros for frequently repeated constructions.
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Lets the teacher configure tool menus to focus student activities.
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Checks geometric properties to test hypotheses based on Euclid's five postulates.
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Hides objects used in constructions to reduce screen clutter.
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Differentiates objects through the use of paint-like color and line palettes.
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Computes a locus continuously.
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Illustrates the dynamic characteristics of figures through animation.
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Allows the user to save drawings and macros to disk.
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Opens geometry constructions created on the TI-92.
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Provides one square meter of full-size work space, and prints the 8.5 by 11.0 inches (21.59 by
27.94 cm) drawing area.
Copying permitted provided TI copyright notice is included
© 1997, 1999 Texas Instruments Incorporated
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