Squeak People diary for hilaire

16 Jun 2006

Fri, 16 Jun 2006 22:13:56 -0700

First public release of DrGeo II

Dr. Geo II is an interactive geometry framework. It allows you to interactively construct geometric figures then to manipulate dynamicaly these figures. It is released under the LGPL licence.

It can be installed from Monticello from http://www.squeaksource.com/DrGeoII.html

Once installed, to open a new interactive geometric drawing, execute 'DrGApp new'.

Free point (on the plane or on curve) and value objects are Etoys powered.

7 May 2006

Sun, 07 May 2006 08:23:41 -0700

Dr.Geo II and geometric transformation

I have been preparing an experimental activity for high school students. It is based on geometric transformations, central symmetry and translation.

To illustrate the topic, a MC Escher drawing is used as a background of the DrGeoII figure.

The basic drawing symbol, a fish-bird, is a DrGeoII composite object (here a group of segments and arcs).

See the online tutorial Mosaïque et transformations géométriques

15 Feb 2006

Wed, 15 Feb 2006 11:35:51 -0700

Dr.GeoII, Squeak, Pyramid, Thales and interactive geometry

I am developing an interactive geometry framework which is smoothly integrated in the Squeak Morph and Etoys systems.

To explain the project and to show its values to educators, I am preparing a set of tutorials with Flash videos. The last one is about the Thales story to calculate a pyramid height, take a look to the tutorial at:

The Thales tutorial

The tutorial shows step by step the design of dynamic geometry contents enriched with multimedia. The resulting dynamic content is a living interactive demonstration educators and students can play with. The content is basically a model related to the Thales theorem but with many variable aspects.