Geometrically, this "great" polyhedron has a polygonal base & sides which come to a common vertex
The great stellated dodecahedron and great icosahedron are dual to 
each ... faces are regular, the square base is not congruent to the triangular sides
),... [DOC] [TLE] 3D Polyhedron Shapes - Facts about Cubes, Pyramids, Tetrahedron ... [PAR] Enjoy learning about 3D polyhedron shapes with our range of interesting facts.