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・ Truncated rhombicuboctahedron
・ Truncated spur
・ Truncated square antiprism
・ Truncated square tiling
・ Truncated square trapezohedron
・ Truncated tesseract
・ Truncated tesseractic honeycomb
・ Truncated tetraapeirogonal tiling
・ Truncated tetrahedral prism
・ Truncated tetrahedron
・ Truncated tetraheptagonal tiling
・ Truncated tetrahexagonal tiling
・ Truncated tetraoctagonal tiling
・ Truncated tetrapentagonal tiling
・ Truncated trapezohedron
Truncated triakis tetrahedron
・ Truncated triangular trapezohedron
・ Truncated triapeirogonal tiling
・ Truncated triheptagonal tiling
・ Truncated trihexagonal tiling
・ Truncated trioctagonal tiling
・ Truncatella
・ Truncatella (fungus)
・ Truncatella (gastropod)
・ Truncatella californica
・ Truncatella caribaeensis
・ Truncatella clathrus
・ Truncatella guerinii
・ Truncatella laurocerasi
・ Truncatella pulchella


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Truncated triakis tetrahedron : ウィキペディア英語版
Truncated triakis tetrahedron

The truncated triakis tetrahedron is a convex polyhedron with 16 faces: 4 sets of 3 pentagons arranged in a tetrahedral arrangement, with 4 hexagons in the gaps. It is constructed from taking a triakis tetrahedron by truncating the order-6 vertices. This creates 4 regular hexagon faces, and leaves 12 irregular pentagons.
A topologically similar equilateral polyhedron can be constructed by using 12 regular pentagons with 4 equilateral but nonplanar hexagons, each vertex with internal angles alternating between 108 and 132 degrees.
==Full truncation==
If all of a triakis tetrahedron's vertices, of both kinds, are truncated, the resulting solid is an irregular icosahedron, whose dual is a ''trihexakis truncated tetrahedron''.
Truncation of only the simpler vertices yields what looks like a tetrahedron with each face raised by a low triangular frustum. The dual to that truncation will be the triakis truncated tetrahedron.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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