ATRACTOR

Areas - Math without words

Áreas e Volumes 1, Gazeta de Matemática, 7/2011 (in Portuguese)

Áreas e Volumes 2, Gazeta de Matemática, 11/2011 (in Portuguese)

Incommensurability

Incomensurabilidade, Gazeta de Matemática, 3/2008 (in Portuguese)

Matemática Viva - Cidade quadriculada (in Portuguese)

Measuring angles and distances

Spherical geometry - materials for ProfMat12

Spherical Geometry - teaching materials

Spherical geometry: Girard′s Theorem

Tangram