KAHFI, Muhammad Azhabul; ALGHADARI, Fiki; ARISHA, Bella. Exploring the Characteristics of High School Students Van Hiele Thinking Levels on Quadratic Functions. Radian Journal: Research and Review in Mathematics Education, [S. l.], v. 5, n. 1, p. 31–42, 2026. DOI: 10.35706/radian.v5i1.13475. Disponível em: https://journal-fkip.unsika.ac.id/index.php/radian/article/view/13475. Acesso em: 7 jul. 2026.