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great truncated cuboctahedron : ウィキペディア英語版 | great truncated cuboctahedron
In geometry, the great truncated cuboctahedron (or quasitruncated cuboctahedron) is a nonconvex uniform polyhedron, indexed as U20. It is represented by Schläfli symbol tr, and Coxeter-Dynkin diagram, . It is sometimes called the quasitruncated cuboctahedron because it is related to the truncated cuboctahedron, , except that the octagonal faces are replaced by octagrams. == Convex hull ==
Its convex hull is a nonuniform truncated cuboctahedron. The truncated cuboctahedron and the great truncated cuboctahedron form isomorphic graphs despite their different geometric structure.
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