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Marbun N, Siburian R, Nasution N, Fatiha S, Girsang RL, Sitorus A, et al. Students’ errors in solving plane geometry problems: A Newman’s error analysis approach. JA [Internet]. 2025 Aug. 30 [cited 2026 Jun. 22];8(2):369-81. Available from: https://journal.upp.ac.id/index.php/absis/article/view/3304