👉 In mathematics, a tetra-symmetric object is an object that can be expressed as the sum of two or more symmetric objects. In other words, it has all its symmetries preserved under a transformation that leaves the symmetry group invariant. This property is known as "tetravalent." For example, the square and the cube are both tetrasymmetric because they can be expressed as the sum of their own duals (the square's dual and the cube's dual).
