In geometry, the heptagonal antiprism is the fifth in an infinite set of antiprisms formed by an even-numbered sequence of triangle sides closed by two polygon caps. Antiprisms are similar to prisms except the bases are twisted relative to each other, and that the side faces are triangles, rather than quadrilaterals. If faces are all regular, it is a semiregular polyhedron.
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| - Antiprisma heptagonal (eu)
- Heptagonal antiprism (en)
- 七角反棱柱 (zh)
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| - Geometrian, antiprisma heptagonala oinarritzat bi heptagono (berdinak, baina bata bestearekiko biraturik) eta albo-aurpegitzat triangeluak dituen poliedroa da. Oinarri baten erpin bat haren parean beste oinarrian dauden ondoz ondoko bi erpinak lotzean sortzen dira albo-aurpegi triangeluarrak. Adibidez, bi oinarriak hexagonoak dituen prisma batean (bi oinarriek zentro bera dute, baina bata bestearekiko π/7 radian biratuta dago), bi oinarrien hamalau erpinak lotzen dituzten hogeita zortzi ertz daude eta irudiak, beraz, hamalau albo-alde triangeluar ditu: antiprisma heptagonal simetriko bat da. (eu)
- 在幾何學中，七角反棱柱又稱為反七角柱或七角反柱是指底為七邊形的反棱柱，側面由三角形組成，若每一個面皆為正多邊形則稱為正七角反棱柱。每個七角反棱柱皆含有16個面，是一種十六面體。 正七角反棱柱是基底為正七邊形的七角反棱柱，其可視為一種半正多面體，施萊夫利符號s{2,7}表示其可以藉由七邊形二面體透過扭稜變換構造。其具有D7對稱群，其在中用| 2 2 7表示。 (zh)
- In geometry, the heptagonal antiprism is the fifth in an infinite set of antiprisms formed by an even-numbered sequence of triangle sides closed by two polygon caps. Antiprisms are similar to prisms except the bases are twisted relative to each other, and that the side faces are triangles, rather than quadrilaterals. If faces are all regular, it is a semiregular polyhedron. (en)
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| - Geometrian, antiprisma heptagonala oinarritzat bi heptagono (berdinak, baina bata bestearekiko biraturik) eta albo-aurpegitzat triangeluak dituen poliedroa da. Oinarri baten erpin bat haren parean beste oinarrian dauden ondoz ondoko bi erpinak lotzean sortzen dira albo-aurpegi triangeluarrak. Adibidez, bi oinarriak hexagonoak dituen prisma batean (bi oinarriek zentro bera dute, baina bata bestearekiko π/7 radian biratuta dago), bi oinarrien hamalau erpinak lotzen dituzten hogeita zortzi ertz daude eta irudiak, beraz, hamalau albo-alde triangeluar ditu: antiprisma heptagonal simetriko bat da. (eu)
- In geometry, the heptagonal antiprism is the fifth in an infinite set of antiprisms formed by an even-numbered sequence of triangle sides closed by two polygon caps. Antiprisms are similar to prisms except the bases are twisted relative to each other, and that the side faces are triangles, rather than quadrilaterals. In the case of a regular 7-sided base, one usually considers the case where its copy is twisted by an angle 180°/n. Extra regularity is obtained by the line connecting the base centers being perpendicular to the base planes, making it a right antiprism. As faces, it has the two n-gonal bases and, connecting those bases, 2n isosceles triangles. If faces are all regular, it is a semiregular polyhedron. (en)
- 在幾何學中，七角反棱柱又稱為反七角柱或七角反柱是指底為七邊形的反棱柱，側面由三角形組成，若每一個面皆為正多邊形則稱為正七角反棱柱。每個七角反棱柱皆含有16個面，是一種十六面體。 正七角反棱柱是基底為正七邊形的七角反棱柱，其可視為一種半正多面體，施萊夫利符號s{2,7}表示其可以藉由七邊形二面體透過扭稜變換構造。其具有D7對稱群，其在中用| 2 2 7表示。 (zh)
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