- regular heptagon
- мат. правильный семиугольник
Большой англо-русский и русско-английский словарь. 2001.
regular heptagon
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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
Regular polygon — A regular polygon is a polygon which is equiangular (all angles are congruent) and equilateral (all sides have the same length). Regular polygons may be convex or star.General propertiesThese properties apply to both convex and star regular… … Wikipedia
Compass and straightedge constructions — Creating a regular hexagon with a ruler and compass Construction of a regular pentagon Compass and straightedge or ruler and compass construction is the construction of lengths, angl … Wikipedia
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Constructible polygon — Construction of a regular pentagon In mathematics, a constructible polygon is a regular polygon that can be constructed with compass and straightedge. For example, a regular pentagon is constructible with compass and straightedge while a regular… … Wikipedia
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Archimedes — /ahr keuh mee deez/, n. 287? 212 B.C., Greek mathematician, physicist, and inventor: discovered the principles of specific gravity and of the lever. * * * born с 290–280 BC, Syracuse, Sicily died 212/211 BC, Syracuse Legendary Greek inventor and… … Universalium
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PSL(2,7) — In mathematics, the projective special linear group PSL(2,7) is a finite simple group that has important applications in algebra, geometry, and number theory. It is the automorphism group of the Klein quartic as well as the symmetry group of the… … Wikipedia
Sideways Stories From Wayside School — The Sideways Stories From Wayside School series is a popular series of 5 books by Louis Sachar. Sideways Stories From Wayside School , Wayside School Is Falling Down and Wayside School Gets A Little Stranger are the three novel length books. In… … Wikipedia
