ANALYZING STUDENTS’ UNDERSTANDING OF MATHEMATICAL CONCEPT ABOUT TWO-DIMENSIONAL FIGURES AT GRADE III OF ELEMENTARY SCHOOLS IN SERANG. Primary: Jurnal Pendidikan Guru Sekolah Dasar, [S. l.], v. 10, n. 5, p. 1142–1151, 2021. DOI: 10.33578/jpfkip.v10i5.8417. Disponível em: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/741. Acesso em: 17 dec. 2025.