Some Applications of Ptolemy’s Theorem in Secondary School Mathematics. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 13, n. 1, p. 180–184, 2020. DOI: 10.29020/nybg.ejpam.v13i1.3605. Disponível em: https://ejpam.com/index.php/ejpam/article/view/3605.. Acesso em: 2 may. 2024.