SITANGGANG, Derma. Analisis Kesulitan Siswa Memahami Konsep, Prinsip, dan Prosedur pada Soal-Soal Materi Garis dan Sudut. Journal of Student Research, [S. l.], v. 2, n. 2, p. 31–46, 2024. DOI: 10.55606/jsr.v2i2.2752. Disponível em: https://scientivapress.org/index.php/jsr/article/view/2752. Acesso em: 12 may. 2026.