Nirmalasari D, Hidayah HN, Salsabila C. Effectiveness of Transparent Concrete Media for Geometry Learning in Improving Junior High School Students’ Understanding of Surface Area. J.Gen.Educ.Humanit. [Internet]. 2025 Dec. 29 [cited 2026 Aug. 11];5(1):283-92. Available from: https://journal-gehu.com/index.php/gehu/article/view/813