- heptagons
- hep·ta·gon || 'heptəgɑn /-gɒn n. seven sided polygon
English contemporary dictionary. 2014.
heptagons
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Heptagon — In geometry, a heptagon is a polygon with seven sides and seven angles. In a regular heptagon, in which all sides and all angles are equal, the sides meet at an angle of 5π/7 radians, 128.5714286 degrees. Its Schläfli symbol is {7}. The area of a … Wikipedia
Order-3 heptagonal tiling — Poincaré disk model of the hyperbolic plane Type Regular hyperbolic tiling Vertex figure 7.7.7 Schläfli symbol(s) … Wikipedia
Heptágono — Un heptágono regular. Un heptágono es un polígono con siete lados y siete vértices. Propiedades Un heptágono tiene 14 diagonales, resultado que se puede obtener aplicando la ecuación general para determinar el número de diagonales de un polígono … Wikipedia Español
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7 (number) — Seven redirects here. For other uses, see Seven (disambiguation). 7 −1 0 1 2 3 4 5 6 7 8 9 → List of numbers Integers … Wikipedia
Allotropes of carbon — Eight allotropes of carbon: a) Diamond, b) Graphite, c) Lonsdaleite, d) C60 (Buckminsterfullerene or buckyball), e) C540, f) C70, g) Amorphous carbon, and h) single walled carbon nanotube or buckytube. This is a list of the allotropes of carb … Wikipedia
Metropolitan Borough of Oldham — For the settlement, see Oldham. Metropolitan Borough of Oldham Metropolitan borough Oldham Civic Centre … Wikipedia
Modular curve — In number theory and algebraic geometry, a modular curve Y(Γ) is a Riemann surface, or the corresponding algebraic curve, constructed as a quotient of the complex upper half plane H by the action of a congruence subgroup Γ of the modular group of … Wikipedia
Graphene — is a one atom thick planar sheet of sp2 bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It can be viewed as an atomic scale chicken wire made of carbon atoms and their bonds. The name comes from GRAPHITE + ENE;… … Wikipedia
Icosahedral symmetry — A Soccer ball, a common example of a spherical truncated icosahedron, has full icosahedral symmetry. A regular icosahedron has 60 rotational (or orientation preserving) symmetries, and a symmetry order of 120 including transformations that… … Wikipedia
