VAN HIELE THEORY AND ITS IMPORTANCE IN TEACHING GEOMETRY. ResearchJet Journal of Analysis and Inventions, [S. l.], v. 6, n. 12, p. 10–18, 2025. DOI: 10.17605/. Disponível em: https://reserchjet.academiascience.org/index.php/rjai/article/view/903. Acesso em: 9 jan. 2026.