DHAKAL, Bed Prasad. Understanding Tangent Plane and Normal Line using 3D Visualization. Mathematics Education Forum Chitwan, [S. l.], v. 10, n. 1, p. 15–26, 2025. DOI: 10.3126/mefc.v10i1.90993. Disponível em: https://www.nepjol.info/index.php/mefc/article/view/90993. Acesso em: 21 feb. 2026.