Training of Luper Borubung (Surface Area of a Sphere, Cone, Cylinder) Demonstration Tools on the Surface Area of Curved Sided Template Figures (BRSL). JISIP [Internet]. 2026 Jan. 5 [cited 2026 Sep. 19];10(1):367-74. Available from: https://ejournal.mandalanursa.org/index.php/JISIP/article/view/9958