Octagrammic Crossed-antiprism
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In geometry, the octagrammic crossed-antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two octagrams. It differs from the octagrammic antiprism by having opposite orientations on the two octagrams. In geometry, an n-sided antiprism is a polyhedron composed of two parallel copies of some particular n-sided polygon, connected by an alternating band of triangles. Antiprisms are a subclass…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In geometry, the octagrammic crossed-antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two octagrams. It differs from the octagrammic antiprism by having opposite orientations on the two octagrams. In geometry, an n-sided antiprism is a polyhedron composed of two parallel copies of some particular n-sided polygon, connected by an alternating band of triangles. Antiprisms are a subclass of the prismatoids. Antiprisms are similar to prisms except the bases are twisted relative to each other, and that the side faces are triangles, rather than quadrilaterals.