Rosa Pimentel, D., Rodrigues Cavalcante, T., & Domingos da Silva, E. (2026). From Green’s Theorem to the Shoelace Formula: An Application to the Calculation of the Area of the State of Tocantins. Revista Tocantinense De Matemática , 1(1). https://doi.org/10.20873/retmat.uft.v1n1.2026.23266