Wooden spoon with a 10 cm scale.
Archimedes' 3:2 ratio comparing the volume and surface area of a cylinder and an inscribed sphere
Illustration eines klassischen Fußballs
Koettgen-Pavillon mit markantem Pyramidendach
Wheel and Axle Simple Machine
Man observing the vanishing point on a long road.
Area conversion: 1 cm² equals 100 mm².
Various folding rules for measuring length.
Spiral notebook page displaying hundreds of decimal digits of the mathematical constant Pi
Wissenschaftler vor einer Tafel mit mathematischen Gleichungen zur Modellierung biologischer Prozesse
Graph of sine and cosine functions generated in a spreadsheet program.
