**FACE PROTECTIVE HELMET FACE SHIELD**

**plastic face shields so-called visors**

– protective helmets

– universal size

– size 22cm x 32 cm

– reusable

– very comfortable preserved

– the right distance between the PET lens and your face, which allows you to breathe freely

** SPATIAL SOLIDS**

**pyramids, prisms:**

– sharp and prisms full height 20 cm.

** A SET OF POLYHEDRONS (FOR STEREOMETRY)**

**Set polyhedrons (for stereometry):**

We present a set of selected models of polyhedrons that illustrate, in addition to the solids themselves, their cross-sections through selected planes facilitating the implementation of the core curriculum for teaching mathematics in secondary schools in the field of stereometry requirements. These solids are: cube, prism correct triangular and six pyramids, whose properties often make it very difficult for students. In addition to discussing cross-sections, these solids can also be useful in students’ understanding of the position of straight lines and planes in space, in recognizing different angles in space (between straight lines, between straight line and plane, between planes), in the ability to apply the theorem of three perpendicular lines. Polyhedron models have been selected for this set that often appear in tasks, also at graduation. These polyhedrons will be an excellent complement to the collection of solids that are already in schools.

** VOLUMES FOR MEASURING VOLUMES:**

**solid for volume measurement (comparative):**

– The set consists of five 15 cm high lumps and 1 kg of granules to fill them during exercises.

– Lumps keep the relationship 1: 1/3

** FRUSTA:**

**Frusta**:

– pyramid with quadrangle base with a diagonal shear plane

– cone with diagonal shear plane

– prism with square base and inclined shear plane

– pyramid with triangular base and diagonal shear plane

– cylinder with diagonal shear plane

– hemisphere

** PYRAMIDS AND PRISMS:**

**Pyramids and prisms**:

– regular pyramid with square base

– regular pyramid with equilateral triangle base

– regular pyramid with equilateral hexagon base

– regular prism with square base

– regular prism with equilateral triangle base

– regular prism with equilateral hexagon base

** INSCRIBED SOLIDS:**

**Inscribed solids:**

– pyramid with quadrilateral base with an inscribed sphere

– pyramid with triangular base with an inscribed sphere

– pyramid with hexagon base with an inscribed sphere

– quadrilateral prism with an inscribed pyramid with quadrilateral base

– hexagonal prism with an inscribed pyramid with hexagonal base

– triangular prism with an inscribed pyramid with triangular base

** FULL SOLIDS**

**Full solids:**

The set includes basic pyramids and prisms and regular solids with square

– triangular,

– hexagonal,

– trapezoid,

– and parallelogram,

– shaped bases.

** REVOLVING SOLIDS**

**Revolving solids:**

– cylinder with marked diagonals and height

– cylinder with planes

– cone with marked diagonals and height

– cone of planes

– sphere with planes and diagonals

– sphere with marked diagonals and height

– optional hemisphere for writing on with dry-erased markers

** DEVICE FOR DEMONSTRATION THE FORMATION OF REVOLVING SOLIDS:**

**Device for demonstration the formation of revolving solids:**

The device with a set of plastic frames (16 pieces) is used to show the formation of revolving solids.

Suitable for math classes in middle schools and high schools.

** REGULAR POLYHEDRA**

**Regular polyhedra:**

– cube with inscribed octahedron

– cube with marked diagonals

– tetrahedron with inscribed tetrahedron

– Tetrahedron with marked elevations

** OBLIQUE POLYHEDRA**

**Oblique polyhedra:**

– regular prism on the basis of a parallelogram

– slanted prism with triangular base

– regular prism with trapezoid base

– regular prism of rectangular base

– pyramid with square base in which one of the side edges is perpendicular to the base

– pyramidal with triangular base in which one of the side edges is perpendicular to the base

**SET OF 18 SKELETAL SOLIDS**

**SKELETAL SOLIDS AND THEIR MAGNETIC GRIDS**

GEOMETRIC SOLIDS WITH A MAGNETIC CUTTING PLANE (STEREOMETRY)