MENGATASI LEARNING OBSTACLE KONSEP TRANSFORMASI GEOMETRI DENGAN DIDACTICAL DESIGN RESEARCH. ALGORITMA: Journal of Mathematics Education, [S. l.], v. 1, n. 2, p. 156–166, 2023. DOI: 10.15408/ajme.v1i2.14076. Disponível em: https://journal.uinjkt.ac.id/algoritma/article/view/14076. Acesso em: 26 oct. 2025.