Tetrahedron (geometry)

A tetrahedron is a solid shape in geometry composed of four triangular faces, with each face sharing edges and vertices. It is a type of polyhedron, specifically the simplest form of a pyramid with a triangular base and three sides meeting at a single point, called the apex. All four faces are equilateral or varied triangles, and the shape has four vertices and six edges. Tetrahedra are fundamental in mathematics and sciences, representing basic building blocks in fields like chemistry, architecture, and 3D modeling, appreciated for their stability and symmetry.