RIVARAL, Etienne Rey; LESTARININGSIH, Desika. EFFECTIVENESS OF PROBLEM BASED LEARNING ASSISTED BY POWERPOINT MEDIA ON STUDENTS’ MATHEMATICAL PROBLEM-SOLVING ABILITY IN JUNIOR HIGH SCHOOL. Perpendicular : Journal of Mathematics Education and Learning, [S. l.], v. 1, n. 2, p. 71–79, 2025. DOI: 10.61994/perpendicular.v1i2.1521. Disponível em: https://jurnal.dokicti.org/index.php/perpendicular/article/view/1521. Acesso em: 19 jan. 2026.