Juan Carlos Ponce Campuzano[br][br]1) Galaxy: Rotations and Dilatations[br]    [url=https://www.geogebra.org/m/pkyxjf7a]https://www.geogebra.org/m/pkyxjf7a[/url][br][br]2) Galaxy II: Rotations and Dilatations[br]    [url=https://www.geogebra.org/m/jntqvr6j]https://www.geogebra.org/m/jntqvr6j[/url][br]