👉 Tetragonalness is a property of structures that are regular and have all sides equal in length. This means that all the faces of a tetrahedron (a type of pyramid) are congruent, meaning they have the same size and shape. Tetragonal structures can also be classified as regular, with each face being an equilateral triangle, where all angles are 60 degrees. Tetragonal structures are commonly found in common materials like wood, concrete, and metal