Antiprism
A Semiregular Polyhedron constructed with 2 
-gons and 
Triangles. The 3-antiprism issimply the Octahedron. The Duals are the Trapezohedra. TheSurface Area of a -gonal antiprism is
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See also Octahedron, Prism, Prismoid, Trapezohedron
References
Ball, W. W. R. and Coxeter, H. S. M. ``Polyhedra.'' Ch. 5 in Mathematical Recreations and Essays, 13th ed. New York: Dover, p. 130, 1987. Cromwell, P. R. Polyhedra. New York: Cambridge University Press, pp. 85-86, 1997.
Weisstein, E. W. ``SolidGeometry.'' Mathematica notebook SolidGeometry.m.
- Endraß Octic
- Energy
- En-Function
- Engel's Theorem
- Enneacontagon
- Enneacontahedron
- Enneadecagon
- Enneagon
- Enneagonal Number
- Enneakaidecagon
- Enneper's Minimal Surface
- Enneper's Negative Curvature Surfaces
- Enneper-Weierstraß Parameterization
- Enormous Theorem
- Enriques Surfaces
- Entire Function
- Entringer Number
- Entropy
- Entscheidungsproblem
- Enumerative Geometry
- Envelope
- Envelope Theorem
- Envyfree
- e-Perfect Number
- Epicycloid