The Problem Solving Ability of Students on the Material Perimeter and Area of a Triangle. Edumatica : Jurnal Pendidikan Matematika, [S. l.], v. 9, n. 02, p. 1-13, 2019. DOI: 10.22437/edumatica.v9i02.6074. Disponível em: https://online-journal.unja.ac.id/edumatica/article/view/6074. Acesso em: 22 jul. 2024.