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On September 30, 2018, the best educational projects of Moscow will gather at one site, and through workshops, lectures and interactive tasks, they will help you to understand and love mathematics.

What awaits you at the festival?

The festival will be held in the format of a series of master classes, lectures, interactive activities for children and their parents.

From 11:00 to 18:00 in parallel in the 15 halls of the guests of the festival the most intense program awaits.

To get around the festival, to take part in all the activities "without recording" and complete the quests of the quest will take approximately 3-4 hours.

The festival will be held in the format of a series of master classes, lectures, interactive activities for children and their parents.

From 11:00 to 18:00 in parallel in the 15 halls of the guests of the festival the most intense program awaits.

To get around the festival, to take part in all the activities "without recording" and complete the quests of the quest will take approximately 3-4 hours.

And, of course, we invite you to stick together a polyhedron and take it with you!

“Mathematical polyhedra from unfoldings: regular polyhedra, Archimedean solids, prisms, pyramids”

Polyhedra / 6 + /

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.

**polyhedron** is a solid bounded by flat polygons, which are called **faces. **The sides of the faces are called **edges**, and their corners are called **vertices**. Depending on the number of faces one can specify a tetrahedron (4 faces), pentahedron (5 faces), etc. A polyhedron is considered to be **convex** if it is located on one side of the plane of each of its faces. A polyhedron is called **regular** if its faces are regular polygons (i.e., where all sides and angles are equal) and all polyhedral angles at the vertices are equal. There are five types of regular polyhedra: tetrahedron, cube (regular hexahedron), octahedron, dodecahedron, icosahedron.

Studio Artemy Lebedev (makes the design for the leading search engine Yandex) was proposed form of a birdhouse in the form of a polyhedron.

The correct polyhedron, the icosahedron, was chosen as the geometric shape.