Photo: Deutsches Museum, München | Reinhard Krause und Hubert Czech
Mathematics
Pantographs in a showcase: These devices can be used to produce enlargements or reductions of images.
Photo: Deutsches Museum, München | Reinhard Krause und Hubert Czech
Photo: Deutsches Museum, München | Reinhard Krause und Hubert Czech
Photo: Deutsches Museum | Christian Illing
Mathematics
The Sierpinski tetrahedron looks like a spatial body, but mathematically it has only the dimension two and is a so-called fractal: From the center of a tetrahedron (edge length 92 cm) an octahedron with half edge length was cut out. From the remaining four tetrahedra now again octahedra with again half edge length were cut. And this process was repeated six times, so that this "pyramid" actually consists of 4096 tiny pyramids (with 1.4 cm edge length).