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Tridecahedron : ウィキペディア英語版
Tridecahedron
A tridecahedron is a polyhedron with 13 faces. There are numerous topologically distinct forms of a tridecahedron, for example the dodecagonal pyramid and hendecagonal prism.
==Convex==

There are 96,262,938 topologically distinct ''convex'' tridecahedra, excluding mirror images, having at least 9 vertices.〔(Counting polyhedra )〕 (Two polyhedra are "topologically distinct" if they have intrinsically different arrangements of faces and vertices, such that it is impossible to distort one into the other simply by changing the lengths of edges or the angles between edges or faces.)

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Tridecahedron」の詳細全文を読む



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