Ligouras, Panagiote. “Basic Geometric-Trigonometric Equalities and Problemsolving: Angular Elements”. EDiMaST: Experiences of Teaching with Mathematics, Sciences and Technology 3, no. 2 (July 2, 2018): 12. Accessed May 20, 2025. https://www.edimast.it/index.php/edimast/article/view/53.