ATRACTOR

A Matemática do Futebol, Gazeta de Matemática, 7/2010 (in Portuguese)

Around the wheel

Beautiful triangles

Borsuk problem

Building Conics

Comparing two geometric problems

Conic billiards

Conics

Constructions by pin-and-string: conics

Curvature and Torsion

Curvature and Torsion

Curvature and Torsion: osculating plane

Curvature and Torsion: The Fundamental Theorem of Curves

Cutting conics

Dandelin Spheres

Figures that tremble

Flat and spherical triangles

Frenet-Serret frame

Hexlet

Hyperbolic slit

Inversion

Lighting conics

Mechanism for drawing the Peaucelier Inversor

Mechanism for tracing the cissoid and strophoid

Morley′s Theorem

Morley′s Theorem: generalization

Osculating circle

Polygonal sequence

Polygonal sequence: triangles

Pythagorean Theorem and Trigonometry: Math without words

Regular stellated polyhedra

Spherical geometry: internal angles of a triangle

Spherical Geometry: Parallel postulate

Spherical geometry: triangles

The curvature function

The loxodrome

Trace of a curve

Triangles with multiple angles

À Volta da Roda, Gazeta de Matemática 11/2010 (in Portuguese)

Actividade: Alguma matemática no futebol (in Portuguese)

Cars supported on axles

Ci passa o non ci passa? (in Italian)

Convex Geometry

Fenda Hiperbólica, Gazeta de Matemática, 3/2014 (in Portuguese)

Figuras que tremem, Gazeta de Matemática, 03/2018 (in Portuguese)

Geometric places in the taxicab metric

Hyperbolic slit

Incommensurability

Knowing Pi better

Matemática Viva - Bilhar elíptico (in Portuguese)

Matemática Viva - Bilhar hiperbólico (in Portuguese)

Matemática Viva - Bilhar parabólico (in Portuguese)

Matemática Viva - Fenda hiperbólica (in Portuguese)

Matemática Viva - Hiperbolóide de fios (in Portuguese)

Matemática Viva - Inversor de Peaucellier (in Portuguese)

Matemática Viva - Lemniscata de Bernoulli (in Portuguese)

Matemática Viva - Rodas de altura constante (in Portuguese)

Matemática Viva - Rodas exóticas (in Portuguese)

Matemática Viva - Rolamento de hipérboles (in Portuguese)

Mechanism

Models of Shells

Morley′s Theorem: parallelograms

Rumos Magnéticos, Gazeta de Matemática, 7/2014 (in Portuguese)

Symmetry

Triângulos Belos, Gazeta de Matemática, 7/2015 (in Portuguese)

Triângulos com Ângulos Múltiplos, Gazeta de Matemática, 11/2012 (in Portuguese)

Versão do Teorema de Morley para Paralelogramos, Gazeta de Matemática, 7/2008 (in Portuguese)