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Exploring Gotong Simalungun’s Approach to Geometry Concepts at SMP Negeri 1 Dolok Batu Nanggar. Jurnal, Pendidikan [Internet]. 2025 Sep. 2 [cited 2026 Jun. 21];10(3):1028-31. Available from: https://ejournal.mandalanursa.org/index.php/JUPE/article/view/9330