## Table of contents

### English

Related pages

Areas - Math without words

Atractor′s column in Gazeta de Matemática

Atractor′s publications that you may wish to buy

Cauchy-Schwarz Inequality - Math without words

Closing the cube kaleidoscope

Comparing two geometric problems

Construction of the Moebius strip and other surfaces

Constructions by pin-and-string: conics

Curvature and Torsion: Easy game

Curvature and Torsion: osculating plane

Curvature and Torsion: The Fundamental Theorem of Curves

DVD Symmetry - the dynamical way

Finite Sums - applets 2D - Math without words

Finite Sums - applets 3D - Math without words

Geometric Activities with Logo

How to rank pages on the web

How to rank pages on the web - Entropy

How to rank pages on the web - The model

How to rank pages on the web: game

Identification numbers with check digit algorithms

Identification numbers with check digit algorithms

Infinite Sums - Math without words

Is Pi normal? An open question...

Kaleidoscope of the Tetrahedron

Mathematical Training of Lifeguards

Morley′s Theorem: generalization

Morley′s Theorem: parallelograms

Movies produced by Atractor

Non-orientability of the Moebius strip

Notable cases of multiplication

Operating with fractions - Math without words

Other publications in Portuguese magazines

Prey and predator: Vector Field

Prey and predators: the model without the fishing

Properties of the Moebius strip

Publications in international magazines/conference proceedings

Pythagorean Theorem and Trigonometry: Math without words

Quadratic equations - Math without words

Representations of surfaces by physical models

Searching digits in the interior of Pi

Stamping a frieze - the cylinder

Stamping a frieze - the Moebius band

Text to Braille translator

The dynamics of a trick: Considering other bases

Triangles with multiple angles

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