Two polyhedra are like two brothers playing or fighting, they rush in a circle or rush forward. After all, polyhedra are related figures.
A polyhedron is obtained by combining two geometric solids - an octahedron and a cube.
The use of two colors - blue for the octahedron and yellow for the cube allows you to see, then after combining the centers of the polyhedra coincided, and each of the vertices counts belonging to the original polyhedron.
Under the guidance of Tatyana Yurievna Timofeyeva, a teacher of mathematics, the guys worked on...