||3D in Ti-Nspire and GeoGebra
This article explains how it is possible to construct a three dimensional coordinate system in Ti-Nspire and GeoGebra. Both software packages offer dynamic geometry in two dimensions and the possibility to enter formulas that will be recalculated continuously. Teachers often need three dimensional visualizations to accompany explanations. Points in space, vectors, straight lines and planes are examples of typical syllabus content in higher mathematics. The focus of the article is both the explanation of the mathematical problems that lie behind such a construction and also to show how we can actually construct true perspective 3d.