- interactive geometry applets
- plane geometry step bY steP
- descriptive geometry step by step
in the applets of the following geogebra books that are dynamic and interactive, one may manipulate certain elements of the construction and analyse the different results obtainable; in other books, the constructions and exercises are solved step-by-step, allowing the user to move backwards or forward in its resolution.
although the text in most of the applets is in portuguese, the constructions are, nonetheless, understandable.