Pimenta, Corália, and Manuel Joaquim Saraiva. “The Construction of a Visual Proof in Trigonometry – the RBC+C Model and GeoGebra”. Revista Latinoamericana de Investigación en Matemática Educativa 29 (September 4, 2026): e678. Accessed October 22, 2026. https://www.relime.org/index.php/relime/article/view/678.