Hello all,
Here is another small demonstration about interactive geometry within Squeak. This demo shows the use of some planar transformations: the central symmetry and the translation are used to build step by step part of the mosaic. It also helps to show the relation between the composed symmetries and the translation.
What I love is the ability within Squeak to mix, at any time, external tools as the PaintBrush or the Etoys ones to verify some ideas or hypothesis. This really help to improve the pedagogical efficiency of the interactive geometry tool, which I found are, in other platform, to much rigid in term of pedagogical exploration capabilities.
I am sorry this demonstration is in French only, but the videos are easy to understand and figure out.
http://www.univ-savoie.fr/Portail/Groupes/fernandes/demos/4-mosaique/index.h...
Hilaire Fernandes