ATRACTOR

3D Kaleidoscopes

Approximations of Pi

Areas - Math without words

Around the wheel

Atractor′s column in Gazeta de Matemática

Atractor′s publications that you may wish to buy

AtrMini

AtrMini - movie

Attractors

Cars supported on axles

Cauchy-Schwarz Inequality - Math without words

Closing the cube kaleidoscope

Comparing two geometric problems

Conic billiards

Construction of the Moebius strip and other surfaces

Constructions by pin-and-string: conics

Courtesy at stake

Curvature - movie

Curvature and Torsion

Curvature and Torsion

Curvature and Torsion: Easy game

Curvature and Torsion: osculating plane

Curvature and Torsion: The Fundamental Theorem of Curves

Cutting conics

DVD Symmetry - the dynamical way

Euclidean Algorithm

Fermat′s Theorem

Fibonacci sequence

Finite Sums - applets 2D - Math without words

Finite Sums - applets 3D - Math without words

Frenet-Serret frame

GeCla

GeCla Mini

Geometric Activities with Logo

Geometric Puzzle

Grass, rabbits and foxes

Hexlet

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

Hyperbolic slit

Hyperbolic slit

Identification numbers with check digit algorithms

Identification numbers with check digit algorithms

Incommensurability

Infinite Sums - Math without words

Inversion

Is Pi normal? An open question...

Isomorphic games

Jacobi method

Kaleidoscope of the Tetrahedron

Knot table

Knowing Pi better

Latitude and longitude

Law of Sines

Light and Colour

Lighting conics

Math without words

Mathematical Images

Mathematical Induction

Mathematical Training of Lifeguards

Mathina Project - Initial page

Mercator projection

Minimal Networks

Models of Shells

Modular Arithmetic

Moebius strip

Morley′s Theorem

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

Osculating circle

Other exhibitions

Other publications in Portuguese magazines

Past exhibitions

Pi in base 27

Polygonal sequence

Polyhedra

Prey and predator: Vector Field

Prey and predators

Prey and predators: the model without the fishing

Projects

Properties of the Moebius strip

Publications in international magazines/conference proceedings

Pythagorean Theorem and Trigonometry: Math without words

Quadratic equations - Math without words

Regular Polyhedra

Representations of surfaces by physical models

Searching digits in the interior of Pi

Shells

Shells - game

Sierpinski Attractor

Sieve of Eratosthenes

Sphere projection

Spherical coordinates

Stamping a frieze - the cylinder

Stamping a frieze - the Moebius band

Stamping a rosette

Stamping the plane 1

Stamping the plane 2

Stamping the plane 3

Stamping the plane 4

StarLogo

Steiner′s Problem

Stereographic projection

Summation

Tangram

Tangram: Similarity

Text to Braille translator

The curvature function

The dynamics of a trick

The dynamics of a trick: Considering other bases

The Law of Malthus

The loxodrome

The math of the shells

The mathematics of tides

The number Pi

The Sperner Game

Trace of a curve

Triangles with multiple angles

Your name in PI