- pentagons
- penÂ·taÂ·gon || 'pentÉ™gÉ‘n /-gÉ’n n. five sided geometric shape

*English contemporary dictionary.
2014.*

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**Fullerene chemistry**— is a field of organic chemistry devoted to the chemical properties of fullerenes. Fullerenes and Related Structures (Topics in Current Chemistry) ISBN 3 540 64939 5 1993] [ Covalent fullerene chemistry François Diederich Pure Appl. Chem., Vol. 69 … Wikipedia**Fullerene**— Buckminsterfullerene C60 (left) and carbon nanotubes (right) are two examples of structures in the fullerene family … Wikipedia**Truncated trapezohedron**— An n agonal truncated trapezohedron is a polyhedron formed by a n agonal trapezohedron with n agonal pyramids truncated from its two polar axis vertices.The vertices exist as 4 n agons in four parallel planes, with alternating orientation in the… … Wikipedia**Kepler–Poinsot polyhedron**— In geometry, a Kepler–Poinsot polyhedron is any of four regular star polyhedra. They may be obtained by stellating the regular convex dodecahedron and icosahedron, and differ from these in having regular pentagrammic faces or vertex figures.… … Wikipedia**Capsid**— Schematic of a Cytomegalovirus 3D model of Helical capsid structure … Wikipedia**Dodecahedron**— Regular Dodecahedron (Click here for rotating model) Type Platonic solid Elements F = 12, E = 30 V = 20 (χ = 2) Faces by sides 12{5} … Wikipedia**Pentagon**— In geometry, a pentagon is any five sided polygon. A pentagon may be simple or self intersecting. The internal angles in a simple pentagon total 540°. Regular pentagons The term pentagon is commonly used to mean a regular convex pentagon, where… … Wikipedia**Gauss–Bonnet theorem**— The Gauss–Bonnet theorem or Gauss–Bonnet formula in differential geometry is an important statement about surfaces which connects their geometry (in the sense of curvature) to their topology (in the sense of the Euler characteristic). It is named … Wikipedia**Golden ratio**— For the Ace of Base album, see The Golden Ratio (album). Not to be confused with Golden number. The golden section is a line segment divided according to the golden ratio: The total length a + b is to the length of the longer segment a as the… … Wikipedia**Penrose tiling**— A Penrose tiling is a nonperiodic tiling generated by an aperiodic set of prototiles named after Roger Penrose, who investigated these sets in the 1970s.Because all tilings obtained with the Penrose tiles are non periodic, Penrose tilings are… … Wikipedia