AZKIANA, A.; NOPRIANA, T.; AMINAH, N. Analysis of Students’ Errors in Solving Surface Area Problems of Spherical Solids Based on Newman’s Error Analysis Theory. International Journal of Geometry Research and Inventions in Education (Gradient), [S. l.], v. 2, n. 01, p. 42–56, 2025. DOI: 10.56855/gradient.v2i01.1339. Disponível em: https://journals.eduped.org/index.php/Gradient/article/view/1339. Acesso em: 26 jun. 2025.