Learning of geometry supported by the Program cabri

Abstract

Programs for computers have been developed many years with the aim to help teacher of mathematics to make education of geometry more efficient. If we criticize software according to quantity of their use in schools the Sketchpad and Cabri Geometrie have the best position among software in the Europe and the USA. This contribution deals with the software Cabri and its use in education of geometry. The authors focused on dynamic features of Cabri Geometrie II Plus mainly various curves being a locus of special points in the plane. Cabri provides enough possibilities also for the users who concentrate to drawing the solutions of more difficult and more attractive problems, but which are presented in a finished static form. However we assume that the real help to teachers of mathematics is mainly in making full use of the dynamic features of the software as we try to show in this contribution.