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KALEFF, A. M. M. R. FORMAS, PADRÕES, VISUALIZAÇÃO E ILUSÃO DE ÓTICA NO ENSINO DA GEOMETRIA. VIDYA, Santa Maria (RS, Brasil), v. 35, n. 2, p. 18, 2015. Disponível em: https://periodicos.ufn.edu.br/index.php/VIDYA/article/view/602. Acesso em: 8 set. 2026.