Elongated triangular cupola
In geometry, the elongated triangular cupola is one of the Johnson solids ("J"). As the name suggests, it can be constructed by elongating a triangular cupola ("J") by attaching a hexagonal prism to its base. Formulae. The following formulae for volume and surface area can be used if all faces are regular, with edge length "a": Dual polyhedron. The dual of the elongated triangular cupola has 15 faces: 6 isosceles triangles, 3 rhombi, and 6 quadrilaterals. Related polyhedra and honeycombs. The elongated triangular cupola can form a tessellation of space with tetrahedra and square pyramids. Elongated triangular