A tetrahedron is a space figure with four faces, forming a pyramid-like structure. It is a Platonic solid with triangular faces, four vertices, and six edges, often used in geometry and crystallography.
A space figure with four faces is called a tetrahedron. A tetrahedron is a three-dimensional geometric shape that consists of four triangular faces, four vertices, and six edges.
Each triangular face connects to every other face at a common vertex, creating a pyramid-like structure. The term "tetrahedron" specifically refers to a polyhedron with four faces, but not all faces need to be congruent.
Tetrahedra are classified as Platonic solids, which are convex polyhedra with identical faces, edges, and angles. They have various applications in geometry, crystallography, and computer graphics.
The simplest form of a tetrahedron has equilateral triangles as its faces, forming a regular tetrahedron, but variations exist with isosceles or scalene triangles as faces.