Flexagons http://www.mathematische-basteleien.de/flexagons.htm
It must have a cross on the reverse side.
Dein Suchergebnis zum Thema: have
Magic Square https://www.mathematische-basteleien.de/magsquare.htm
If you take the numbers 1 to 9, you have the standard square. ………….8+c
Taxicab Geometry https://www.mathematische-basteleien.de/taxicabgeometry.htm
Formula: AP+PB= |x2-x1| + |y2-y1| The points have only integer coordinates in the
Tetracube https://www.mathematische-basteleien.de/tetracube.htm
Building Rectangular Solids of Tetracubes top The tetracubes have 32 cubes
Hypercube http://www.mathematische-basteleien.de/hypercube.htm
Together the six squares have 6×4=24 sides. 2×5=10 sides (red) are bound.
Magic Hexagon https://www.mathematische-basteleien.de/magichexagon.htm
The hexagons have 1,7,19, 37, … small hexagons.
Oscillation by Friction http://www.mathematische-basteleien.de/oscillation.htm
Hence you have an harmonic motion.
Picture Cube Puzzle https://www.mathematische-basteleien.de/cubepuzzle.htm
Turning the Cubes top After you have solved one puzzle, you can easily get the
Magic Folding Cube https://www.mathematische-basteleien.de/magiccube.htm
The sides don’t have the same colour, but they show nine different pictures, six
Tangrams http://www.mathematische-basteleien.de/tangrams.htm
The difference is: You have to change the rational und irrational length of a side