tetraedrët
Tetraedri is a geometric term referring to a polyhedron with four faces. These faces are always triangles. A tetrahedron is the simplest of all the regular and irregular polyhedra. It has four vertices, which are the points where the edges meet, and six edges, which are the line segments connecting the vertices. The shape of the faces can vary, meaning a tetrahedron doesn't always have to be a regular shape. However, when all four faces are equilateral triangles and all edges are of equal length, it is called a regular tetrahedron. This regular form is one of the five Platonic solids. Tetrahedra are fundamental shapes in geometry and find applications in various fields, including crystallography, chemistry where they form the basis of molecular structures like methane, and in computer graphics for mesh modeling. The volume of a tetrahedron can be calculated using a specific formula involving the area of its base and its height.