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In geometry, a heptagon or septagon is a seven-sided polygon or 7-gon.. The heptagon is sometimes referred to as the septagon, using "sept-" (an elision of septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix "-agon" meaning angle.
Kajang Dispersal Link Expressway, SILK, also known as Kajang SILK Highway Kajang Dispersal Link Expressway (Malay: Sistem Lingkaran-Lebuhraya Kajang), is an expressway built to disperse and regulate the traffic flow in Kajang, Selangor, Malaysia. The 37 km (23 mi) expressway is to allow motorists to bypass the town centre of Kajang.
Four-sided dice were among the gambling and divination tools used by early man who carved them from nuts, wood, stone, ivory and bone. [2] Six-sided dice were invented later but four-sided dice continued to be popular in Russia.
Butterworth Outer Ring Road (BORR) (Malay: Lebuhraya Lingkaran Luar Butterworth) is a coastal expressway located in Butterworth, Penang, Malaysia. This 14 km (8.7 mi) expressway connects Sungai Dua in the north until Perai in the south.
The first known trigonometric table, compiled by Hipparchus in the 2nd century BC, is no longer extant but tabulated the value of the chord function for every 7 + 1 / 2 degrees. In the 2nd century AD, Ptolemy compiled a more extensive table of chords in his book on astronomy , giving the value of the chord for angles ranging from 1 / ...
The nabla is a triangular symbol resembling an inverted Greek delta: [1] or ∇. The name comes, by reason of the symbol's shape, from the Hellenistic Greek word νάβλα for a Phoenician harp, [2] [3] and was suggested by the encyclopedist William Robertson Smith in an 1870 letter to Peter Guthrie Tait.
The name "Kepler triangle" for this shape was used by Roger Herz-Fischler, based on Kepler's 1597 letter, as early as 1979. [7] Another name for the same triangle, used by Matila Ghyka in his 1946 book on the golden ratio, The Geometry of Art and Life , is the "triangle of Price", after pyramidologist W. A. Price.
In geometry, the 5-cell is the convex 4-polytope with Schläfli symbol {3,3,3}. It is a 5-vertex four-dimensional object bounded by five tetrahedral cells. It is also known as a C 5, hypertetrahedron, pentachoron, [1] pentatope, pentahedroid, [2] tetrahedral pyramid, or 4-simplex (Coxeter's polytope), [3] the simplest possible convex 4-polytope, and is analogous to the tetrahedron in three ...