RUNESSON, U. A collective enquiry into critical aspects of teaching the concept of angles. NOMAD Nordic Studies in Mathematics Education, [S. l.], v. 12, n. 4, p. 7–25, 2007. DOI: 10.7146/nomad.v12i4.148044. Disponível em: https://tidsskrift.dk/NOMAD/article/view/148044. Acesso em: 5 dec. 2024.