SARI, Putri Lingga; FRISNOIRY, Suci. The effect of problem-based learning model assisted by geogebra on students’ mathematical problem-solving ability in SPLDV material of 9th grade at state junior high school 45 Medan. Jurnal THEOREMS (The Original Research of Mathematics), [S. l.], v. 11, n. 1, p. 58–72, 2026. DOI: 10.31949/th.v11i1.16192. Disponível em: https://www.ejournal.unma.ac.id/index.php/th/article/view/16192. Acesso em: 16 jun. 2026.