Mufaricha Ulia Anjani, Akhmad Jufriadi, Qomariyah. Improving Elementary School Students’ Understanding of the Concept of Flat Geometry Elements Through an Open-Ended Approach. JPLED [Internet]. 2026 Jun. 1 [cited 2026 Oct. 8];6(2):2197-20. Available from: https://www.digitalpress.gaes-edu.com/index.php/jpled/article/view/1246