LE HOAI THONG, Nguyen; ANH TUONG, Hoa. USING GEOGEBRA IN TEACHING CONES TO DEVELOP THE COMPETENCY USING MATHEMATICAL AIDS AND TOOLS FOR GRADE 9 STUDENTS. Journal of Science Educational Science, [S. l.], v. 69, n. 5B, p. 60–71, 2024. DOI: 10.18173/2354-1075.2024-0135. Disponível em: https://hnuejs.edu.vn/es/article/view/708. Acesso em: 8 may. 2025.