0.00 $

0 item(s)

--- . ---

A red pyramid passed through a white pyramid, or vice versa. Or maybe it is a complex of pyramids directed in different directions. These figures are always a mystery.

--- . ---

The presented image of this polyhedron illustrates exactly its second name - the compound of two tetrahedra. Here you can imagine a red tetrahedron pointing up through a beige tetrahedron that points down.

However, mathematicians prefer to call the polyhedron a stellated octahedron.

The stellated octahedron could be defined as a regular polyhedron, since all its faces are regular triangles of the same size and all angles between them are equal. But in fact, this geometric solid is not the sixth regular polyhedron on par with the five known Platonic solids. The reason is that the word convex is present in the definition of a regular polyhedron—that is, all faces must lie on one side of the plane passing through any of them.

**
**

** **

For a primeval man, fire once became a new form of social life. The night ceased to be an...

What happens if a flat geometric shape, such as a rectangle, begins to rotate rapidly relative to...

The plot of the fantastic blockbuster "The Fifth Element", is built on the legend that there are...

Under the guidance of Tatyana Yurievna Timofeyeva, a teacher of mathematics, the guys worked on the...

We open the veil of the secrets - how our products are made. And let's do it on the example of...

This group of five geometric solids was given the name of the ancient Greek scientist Plato....

This is a new, very unusual way to create a star octahedron model. The polyhedron itself was...