× )( ) ∨ ()|-|bgcolor=#e7dcc3|Cells|7|……"> Cubic pyramid について
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Words near each other
・ Cubic group
・ Cubic harmonic
・ Cubic Hermite spline
・ Cubic honeycomb
・ Cubic honeycomb honeycomb
・ Cubic IDE
・ Cubic inch
・ Cubic lattice
・ Cubic mean
・ Cubic metre
・ Cubic metre per second
・ Cubic mile
・ Cubic mile of oil
・ Cubic Ninja
・ Cubic plane curve
Cubic pyramid
・ Cubic reciprocity
・ Cubic River
・ Cubic surface
・ CUBIC TCP
・ Cubic threefold
・ Cubic ton
・ Cubic Transportation Systems
・ Cubic yard
・ Cubic zirconia
・ Cubic Zirconia (band)
・ Cubic-icosahedral honeycomb
・ Cubic-octahedral honeycomb
・ Cubic-square tiling honeycomb
・ Cubic-triangular tiling honeycomb


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Cubic pyramid : ウィキペディア英語版
Cubic pyramid
" TITLE="">× )
( ) ∨ (cube
6 square pyramids
|-
|bgcolor=#e7dcc3|Faces
|18
|12
6
|-
|bgcolor=#e7dcc3|Edges
|colspan=2|20
|-
|bgcolor=#e7dcc3|Vertices
|colspan=2|9
|-
|bgcolor=#e7dcc3|Dual
|colspan=2|Octahedral pyramid
|-
|bgcolor=#e7dcc3|Symmetry group
|colspan=2|B3, (), order 48
(), order 16
(), order 8
|-
|bgcolor=#e7dcc3|Properties
|colspan=2|convex, regular-faced
|}
In 4-dimensional geometry, the cubic pyramid is bounded by one cube on the base and 6 square pyramid cells which meet at the apex. Since a cube has a circumradius divided by edge length less than one,〔 sqrt(3)/2 = 0.866025〕 the square pyramids can made with regular faces by computing the appropriate height.
The regular 24-cell has ''cubic pyramids'' around every vertex.
The dual to the cubic pyramid is a octahedral pyramid, seen as an octahedral base, and 8 regular tetrahedral meeting at an apex.
:
== Related polytopes and honeycombs==

A cubic pyramid of height zero can be seen as a cube divided into 6 square pyramids along with the center point. These square pyramid-filled cubes can tessellate three-dimensional space as a dual of the truncated cubic honeycomb, called a ''hexakis cubic honeycomb'', or pyramidille.

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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