| 11. | It can be seen as a convex antiprism, with tetrahedra removed between pairs of triangles.
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| 12. | If the faces of the pentagonal antiprism are all regular, it is a semiregular polyhedron.
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| 13. | The structure of the grand antiprism is analogous to that of the 3-dimensional antiprisms.
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| 14. | Two rings of 10 pentagonal antiprisms each bound the hypersurface of the 4-dimensional grand antiprism.
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| 15. | The gyroelongated square pyramid is a square pyramid with a square antiprism connected to the square base.
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| 16. | If two pentagonal pyramids are removed to form nonadjacent pentagonal faces, the result is instead the pentagonal antiprism.
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| 17. | An alternated apeirogonal prism is a apeirogonal antiprism, with each vertex bounded by three triangles and an apeirogon.
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| 18. | The snub disphenoid can also constructed from the square antiprism by replacing the two square faces by pairs of equilateral triangles.
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| 19. | All except the " grand antiprism prism " are based on Wythoff constructions, reflection symmetry generated with Coxeter groups.
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| 20. | The "'grand antiprism prism "'is the only known convex non-Wythoffian uniform 5-polytope.
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