Movies produced by Atractor (*) Resize


Movie Collection

Conics

Constructions by pin-and-string: conics

Cutting conics

Lighting conics


Trajectory of a ball in an elliptical billiard


Patterns, friezes and rosettes

Stamping a rosette

Stamping a frieze - the cylinder

Stamping a frieze - the Moebius band


Friezes in "azulejos"

Patterns in "azulejos"

Stamping the plane 1


Stamping the plane 2

Stamping the plane 3

Stamping the plane 4


Symmetry of rosettes and friezes

Rotation symmetry of a rosette

Reflection symmetry of a rosette

Rosette with 3 rotation symmetries


Rosette with 4 reflection and 4 rotation symmetries

Frieze - a translation symmetry which is minimal

Frieze - a translation symmetry which is not minimal


A frieze with rotation symmetry

A frieze without rotation symmetry

A frieze with glide reflection symmetry


Kaleidoscopes - platonic solids

Kaleidoscope of the Tetrahedron

3D Kaleidoscopes

Closing the cube kaleidoscope


Others

The math of the shells

Curvature

Hyperbolic slit


AtrMini


All the movies can also be seen in Atractor's YouTube Channel.

(*) The movies included here were developed under a grant by FCT - Fundação para a Ciência e a Tecnologia.

Difficulty level: Lower Secondary, Upper Secondary, University