Bipyramid

A bipyramid made with straws and elastics. An extra axial straw is added which doesn't exist in the simple polyhedron

An n-gonal bipyramid or dipyramid is a polyhedron formed by joining an n-gonal pyramid and its mirror image base-to-base. An n-gonal bipyramid has 2n triangle faces, 3n edges, and 2+n vertices.

The referenced n-gon in the name of the bipyramids is not an external face but an internal one, existing on the primary symmetry plane which connects the two pyramid halves.

单词	scalenohedron
释义	scalenohedron /ˌskeilənɔ'hi:drən/ 英汉-汉英词典 n. 偏三角面体词组 \| 习惯用语您要查找的是不是： stranglehold n. 压制自由；[体]勒颈 dodecahedron n. 十二面体 octahedron n. 八面体 icosahedron n. 二十面体 scalenohedron n. 偏三角；偏三角面体网络短语: ditrigonal scalenohedron 复三方偏三角面体 hexagonal scalenohedron 六方偏三角面体 tetragonal scalenohedron 正方偏三角面体英语百科 Bipyramid An n-gonal bipyramid or dipyramid is a polyhedron formed by joining an n-gonal pyramid and its mirror image base-to-base. An n-gonal bipyramid has 2n triangle faces, 3n edges, and 2+n vertices. The referenced n-gon in the name of the bipyramids is not an external face but an internal one, existing on the primary symmetry plane which connects the two pyramid halves.
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scalenohedron /ˌskeilənɔ'hi:drən/

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网络短语:

Bipyramid