Methods Of Demonstrating Concurrence Lines In A Tetrahedron

This article discusses the advantages of teaching-learning Geometry with the help of the new educational technologies to motivate students and undergraduates, which may lead to building focus, interactivity and feedback during lessons. The 3rd-year students from the Department of Mathematics, “Vasile Alecsandri” University of Bacău, also attending the courses of the Pre- and In-Service Teacher Training Department, have experimented the relevance of the new technologies in teaching and learning Geometry, by applying a new approach to the design and conduct of a lesson of Geometry. The research was conducted during the 2014-2015 school year, involving two groups, each of them comprising 132 students: 66 children, from 3 classes having 22 students on the average each, experimental group – the 8th A grade from “Octavian Voicu” Middle School, Bacău, and 66 children, from 3 classes having 22 students on the average each, a control group – the 8th B grade from “Miron Costin” Middle School, Bacău and demonstrated the efficiency of teaching Geometry the concurrence of relevant lines in a tetrahedron by using computers in solving problems and promoting Geometry knowledge, building active thinking and competences, as well as skills in representing plane and space geometrical figures.