Computer technology and the teaching of geometry

This chapter deals with the interplay of computer technology and geometry. The sections of the chapter deal with the links between drawings and the theoretical geometrical objects they represent, whether the introduction of dynamic geometry systems promotes the transition from informal proof to formal proof in mathematics or makes it even more difficult for learners, how the computer can help connect school geometry to professional needs, how situations involving graphic representations of 3D objects compare when tackled using different tools, and newly possible applications illustrating how the computer can serve as a catalyst for unprecedented pedagogical activities. Together, the four sections provide a global picture of debates and trends, and a projection on possible perspectives for the teaching of geometry in the 21st century