Frida Marta Argareta Simorangkir et al. 2025. Development of desmos application integrated ethnomathematics on geometry for grade IV UPT SDN 101826 Tuntungan. Primary: Jurnal Pendidikan Guru Sekolah Dasar. 14, 4 (Aug. 2025), 485–498. DOI:https://doi.org/10.33578/jpfkip.v14i4.p485-498.