The materials contain detailed steps and procedures that are very useful for the teachers and students in the class of mathematics and other sciences. They are just a sample of a theme: the teachers and the students can create other works, even more important and more complicated.
1. Observations on the elements of the regular polygon
2. Rotation of a polygon
3. The Dynamic Solar System with Elliptical Orbits
4. Pulfrich Phenomenon demonstrated with GeoGebra applet.
5. Demonstration:Sum of the angles of the hyperbolic triangle
Observations on the elements of the regular polygon
Observations on the elements of the regular polygon and the circle[br]inscribed in it while the number n of the sides is changed:[br]angle, side, radius, areas etc..
Observations on the elements of the regular polygon