TACHIE, S. A. The Challenges of South African Teachers in Teaching Euclidean Geometry. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 19, n. 8, p. 297–312, 2020. Disponível em: http://ijlter.myres.net/index.php/ijlter/article/view/274. Acesso em: 11 jan. 2026.