4D Euclidean space
This is the decaaugmented 5,20-duoprism, an augmentation of the 5,20-duoprism with 10 pentagonal prism pyramids. Due to the angle between the pentagonal pyramid and pentagonal prism cells in the latter, the pentagonal pyramids are coplanar with the adjacent pentagonal prisms on the 5,20-duoprism, causing them to merge into 10 elongated pentagonal bipyramids (J16).
29 Apr 2019:
5 Apr 2019:
1 Apr 2019:
The Polytope of the Month for April is up!
Updated the family portrait of the 3D uniform polyhedra: