Sari, Putri Lingga, and Suci Frisnoiry. “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) 11, no. 1 (January 31, 2026): 58–72. Accessed June 16, 2026. https://www.ejournal.unma.ac.id/index.php/th/article/view/16192.