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This animation demonstrates the angle of inclination of lines and planes in various positions.
This animation demonstrates various types of cones and pyramids.
An exercise about the generation of solids of revolution.
Rotating a rectangle around its axes of symmetry or around its sides results in solids of revolution.
The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.
The Széchényi Chain Bridge, named after István Széchenyi, was the first permanent bridge across the Danube between Pest and Buda.
Drums are played by hitting the membrane. There are many versions of drums.
Small farms usually located near the border of rural towns, inhabited by peasants.
The geographical distribution of major (world) religions has been influenced by historical events.
An acyl-carrier coenzyme taking part in both anabolic and catabolic processes.
Soldiers of the Wehrmacht in World War II were well-trained and well-equipped with modern weapons.
The Roman army, led by Flavius Aetius, stopped the Hun invasion led by king Attila
Soldiers of the ancient Macedonian Kingdom were dreaded warriors.
One of the most important battles of World War II proved to be a turning point of the War in the Pacific
Colourless, odourless gas, highly toxic to humans and animals in high concentration.
The protective embankment, or, in case of minor floods, the summer dyke ensures the protection against flood damage.
A type of settlement that has central functions.
In the battle fought at the shores of Hellas, Octavian won a decisive victory over Marcus Antonius.
One of the most important parts of a medieval castle was the Knights´ hall.
Medieval knights were vassals of feudal lords and fought on horseback in battles.