“ Peningkatan Pemahaman Konsep Bangun Datar Segitiga melalui Pendekatan Realistic Mathematics Education di Kelas II SD”, IJPE, vol. 2, no. 1, pp. 78–86, Jun. 2018, Accessed: Sep. 28, 2026. [Online]. Available: https://ejournal-tasikmalaya.upi.edu/ijpe/article/view/244