8 relations: Antiprism, Geometry, Heptagram, Heptagrammic antiprism (7/3), Star polygon, Star polyhedron, Triangle, Uniform polyhedron.
Antiprism
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.
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Geometry
Geometry (from the γεωμετρία; geo- "earth", -metron "measurement") is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.
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Heptagram
A heptagram, septagram, septegram or septogram is a seven-point star drawn with seven straight strokes.
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Heptagrammic antiprism (7/3)
In geometry, the heptagrammic antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two heptagrams.
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Star polygon
In geometry, a star polygon is a type of non-convex polygon.
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Star polyhedron
In geometry, a star polyhedron is a polyhedron which has some repetitive quality of nonconvexity giving it a star-like visual quality.
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Triangle
A triangle is a polygon with three edges and three vertices.
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Uniform polyhedron
A uniform polyhedron is a polyhedron which has regular polygons as faces and is vertex-transitive (transitive on its vertices, isogonal, i.e. there is an isometry mapping any vertex onto any other).
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References
[1] https://en.wikipedia.org/wiki/Heptagrammic_antiprism_(7/2)