TY - JOUR
TI - Conceptions de l’angle chez des élèves de seconde
AU - Vadcard, Lucile
T2 - Recherches En Didactique Des Mathématiques
AB - This article reports a study of the conceptions of angle possessed by 15-year-olds who had not studied the notion of directed angle. The theoretical framework-in particular, the notion of conception-was that described in Balacheff (1995 a, b). We initially studied some aspects of the notion of angle as slope. This interpretation has been much neglected in the educational research literature and in instruction despite its great historical importance (it was Euclid’s definition) and its practicality (e.g., it is used by topographers). We continued by examining current textbooks so as to define the spheres of practices that students associate with the notion of angle. Finally, we present the design of an experimental device that we used to test our hypothesis about the conceptions of angle available to students in a problem-solving situation with Cabri Geometry II. It was a communication situation that involved changing the size of a pentagon without recourse to measuring lengths. The results, illustrated by a case study, show that a conception of angle as slope is accessible to pupils, although they first mobilize angle conceptions that are closely linked to the direct characteristics of the figure (edges and sides).
DA - 2002///
PY - 2002
VL - 22
IS - 1
SP - 77
EP - 120
J2 - RDM
LA - FR
SN - 0246–9367
UR - https://revue-rdm.com/2002/conceptions-de-l-angle-chez-des/
ER -