Frida Marta Argareta Simorangkir, Lolly Jean C. Simbulas, Ferry Indra Sakti H. Sinaga. Development of desmos application integrated ethnomathematics on geometry for grade IV UPT SDN 101826 Tuntungan. JPFKIP. 2025;14(4):485-498. doi:10.33578/jpfkip.v14i4.p485-498