 8-simplex   
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 Truncated 8-simplex
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 Rectified 8-simplex
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 Quadritruncated 8-simplex
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 Tritruncated 8-simplex
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 Bitruncated 8-simplex
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| Orthogonal projections in A8 Coxeter plane | ||
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In eight-dimensional geometry, a truncated 8-simplex is a convex uniform 8-polytope, being a truncation of the regular 8-simplex.
There are four unique degrees of truncation. Vertices of the truncation 8-simplex are located as pairs on the edge of the 8-simplex. Vertices of the bitruncated 8-simplex are located on the triangular faces of the 8-simplex. Vertices of the tritruncated 8-simplex are located inside the tetrahedral cells of the 8-simplex.