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Project News Polyhedr.com in August 2020
Added assembly diagram of a new model:
Our polyhedra are of interest all over the world.
The Magic Edges sets caught the attention of a mathematics professor at the University of Berkeley (California, USA). Mr. Richard Borcherds, left a wish to complement the series with ball-shaped models with an internal structure related to the symmetry groups of the tetrahedron, octahedron, and icosahedron. And attached photos of models.
Special thanks to Mr. Richard Borcherds. It is pleasant to know that our products have received attention at a university with a century and a half history, which in 2016 took third place in the academic ranking of the best universities in the world.
Updated article:
Updated article:
New video from our partners - "ART KOSEKOMA" team, visualization of the function and its projections
Merkaba - energy polyhedron
According to some spiritual teachings, a polyhedron already familiar to us — a compound of two tetrahedra (stellated octahedron) — is not just a geometric form. This form is endowed with powerful energy and maybe even supernatural properties.
Nets solids of revolution. How to make pdf template
What happens if a flat geometric shape, such as a rectangle, begins to rotate rapidly relative to one of its sides?
We create a new geometric solid in space by rotation.
Archimedean Polyhedra. How to make pdf template
Archimedes, a scientist from Ancient Greece, discovered thirteen types of polyhedra, now called Archimedean solids, referred to as semi-regular polyhedra.
Divide the icosahedron (into parts)
The star of hope
Mathematical properties of the Platonic solids
One can specify the following mathematical characteristics in each of the five Platonic solids:
1. The radius of the sphere circumscribing the polyhedron;
2. The radius of the sphere inscribed in the polyhedron;
3. The surface area of the polyhedron;
4. The volume of the polyhedron.
Dual pairs of polyhedra
What do the dodecahedron and icosahedron have in common?
Polyhedra in nature
In the natural environment, regular polyhedra can be found in the form of crystals (minerals).
The form of the tetrahedron is transmitted by antimony sodium sulfate.
Dudeny dissection
Is it possible to cut a triangle into such several parts so that one can put a square together?
Polyhedra in architecture. Alexandria Lighthouse
The Lighthouse of Alexandria, one of the Seven Wonders, was built in the 3d century BC in an ancient city Alexandria in Egypt to keep the boats away from the reef on their way to Alexandria bay. At that time, Posidippus wrote the following words about a new lighthouse:
