Tetrahedron

A tetrahedron is a three-dimensional shape with four triangular faces, four vertices (corners), and six edges. Imagine a pyramid with a triangular base—its shape is a tetrahedron. It is the simplest form of a polyhedron where all faces are equal triangles, making it a regular tetrahedron. Tetrahedra are fundamental in geometry and useful in fields like chemistry, where they describe molecular structures such as methane. Its symmetry and structural stability make it an important shape in both natural and man-made structures.