1. It is a square bipyramid in any of three orthogonal orientations. 2. An icosahedron can also be called a gyroelongated pentagonal bipyramid . 3. The triangular bipyramid can form a tessellation of space with truncated tetrahedra. 4. What do you call a bipyramid with shaved base? 5. Each gallium atom bonds to 5 other gallium atoms forming a distorted trigonal bipyramid . 6. :With regular faces, I think you're describing the elongated square bipyramid . 7. This polyhedron can be constructed by taking a pentagonal bipyramid and truncating the polar axis vertices. 8. It can be seen as a " dual of a pentagonal prism is a pentagonal bipyramid . 9. It can be seen as a "'dual of a hexagonal prism is a hexagonal bipyramid . 10. Fill in the bipyramid to make it solid and give the triangles on the boundary the same identification as above.