Dr. Geo script for primary school activity

Hi,

Okay this one is really a complex one[1], but Dr. Geo scripts are
definitely not 2 lines of code, but Smalltalk code[2] :)

In a few words, it is a sketch for primary school learners. The student
must build some expected polygons and the Dr. Geo script provides the
appropriate textual and graphic feedback.

Video demo: https://plus.google.com/+DrgeoEu/posts/CbXLuWhms8E

Hilaire

[1] How to decide two collections of points represent the same polygon?
And we have to deal with point being Float...
[2] Sketch file on request

--
Dr. Geo
http://drgeo.eu
http://google.com/+DrgeoEu