Rectified 5-cell

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In four-dimensional geometry, the rectified 5-cell is a uniform 4-polytope composed of 5 regular tetrahedral and 5 regular octahedral cells. Each edge has one tetrahedron and two octahedra. Each vertex has two tetrahedra and three octahedra. In total it has 30 triangle faces, 30 edges, and 10 vertices.

Excerpt from the Wikipedia article “Rectified 5-cell”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Original uploader was Tomruen at en.wikipedia, Attribution, via Wikimedia Commons.