Prismatoid polyhedra

Pentagonal antiprism

In geometry, the pentagonal antiprism is the third in an infinite set of antiprisms formed by an even-numbered sequence of triangle sides closed by two polygon caps. It consists of two pentagons joined to each other by a ring of 10 triangles for a total of 12 faces. Hence, it is a non-regular dodecahedron. (Wikipedia).

Pentagonal antiprism
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From playlist Science Unplugged: General Relativity

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Related pages

Polytope | Alternation (geometry) | Vertex configuration | Semiregular polyhedron | Vertex arrangement | Pentagonal prism | Pentagon | Metabidiminished icosahedron | Dodecahedron | Johnson solid | Isosceles triangle | Truncation (geometry) | Icosahedron | Regular icosahedron | 600-cell | Pentagonal pyramid | Geometry | Triangle | Antiprism | Grand antiprism