triangular bipyramid造句

The triangular bipyramid can form a tessellation of space with truncated tetrahedra.
This honeycomb can be alternated into the gyrated tetrahedral-octahedral honeycomb, with pairs of tetrahedra existing in the alternated gaps ( instead of a triangular bipyramid ).
As the name suggests, it can be constructed by elongating a triangular bipyramid ( " J " 12 ) by inserting a triangular prism between its congruent halves.
In particular, the Goldner Harary graph, the Kleetope of the triangular bipyramid, has six vertices added in the Kleetope construction and only five in the bipyramid from which it was formed, so it is non-Hamiltonian; it is the simplest possible non-Hamiltonian simplicial polyhedron.
It is a three-unit hexahedron built around the notional scaffold of a flat equilateral triangle ( two " faces ", three edges ); the protruding tab / pocket flaps are simply reconnected on the underside, resulting in two triangular pyramids joined at the base, a triangular bipyramid.
It's difficult to find triangular bipyramid in a sentence. 用triangular bipyramid造句挺难的

This definition rules out, for example, the square pyramid ( since although all the faces are regular, the square base is not congruent to the triangular sides ), or the shape formed by joining two tetrahedra together ( since although all faces of that triangular bipyramid would be equilateral triangles, that is, congruent and regular, some vertices have 3 triangles and others have 4 ).