The Golden Rectangle and Nautilus

The Golden Rectangle[br][br]In this activity you are going to construct a Golden Rectangle and to create a new Geogebra tool. Geogebra has "user defined tools": this means you can create your own tools for the toolbar by taking an existing construction and specifying input and output objects of your new tool.[br]
Nautilus
Hint: If you are not sure about the construction process, you might want to have a look at the file .pdf below.
Spirali in matematica

Information: The Golden Rectangle and Nautilus