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  2. Euclidean tilings by convex regular polygons - Wikipedia

    en.wikipedia.org/wiki/Euclidean_tilings_by...

    Broken down, 3 6; 3 6 (both of different transitivity class), or (3 6) 2, tells us that there are 2 vertices (denoted by the superscript 2), each with 6 equilateral 3-sided polygons (triangles). With a final vertex 3 4 .6, 4 more contiguous equilateral triangles and a single regular hexagon.

  3. Collinearity - Wikipedia

    en.wikipedia.org/wiki/Collinearity

    If the quadrilateral is a tangential quadrilateral, then its incenter also lies on this line. [6] In a convex quadrilateral, the quasiorthocenter H, the "area centroid" G, and the quasicircumcenter O are collinear in this order, and HG = 2 GO. [7] (See Quadrilateral#Remarkable points and lines in a convex quadrilateral.)

  4. Polyhedron - Wikipedia

    en.wikipedia.org/wiki/Polyhedron

    This class may be subdivided into a regular, quasi-regular, or semi-regular polyhedron, and may be convex or starry. The dual is face-transitive and has regular vertices but is not necessarily vertex-transitive. The uniform polyhedra and their duals are traditionally classified according to their degree of symmetry, and whether they are convex ...

  5. 1989 Tiananmen Square protests and massacre - Wikipedia

    en.wikipedia.org/wiki/1989_Tiananmen_Square...

    Zhao stressed three points: discourage students from further protests and ask them to go back to class, use all measures necessary to combat rioting, and open forms of dialogue with students at different levels of government. [94] Premier Li Peng called upon Zhao to condemn protestors and recognize the need to take more serious action.

  6. Milan - Wikipedia

    en.wikipedia.org/wiki/Milan

    Milan (/ m ɪ ˈ l æ n / mil-AN, US also / m ɪ ˈ l ɑː n / mil-AHN, [5] [6] Milanese: ⓘ; Italian: Milano ⓘ) is a city in northern Italy, regional capital of Lombardy, the largest city in Italy by urban population [7] and the second-most-populous city proper in Italy after Rome.

  7. List of Christian denominations - Wikipedia

    en.wikipedia.org/wiki/List_of_Christian...

    [8] [9] Within these six main traditions are various Christian denominations (for example, the Coptic Orthodox Church is an Oriental Orthodox denomination). Protestantism includes many groups which do not share any ecclesiastical governance and have widely diverging beliefs and practices. [ 10 ]

  8. Expressways of India - Wikipedia

    en.wikipedia.org/wiki/Expressways_of_India

    32 km (19.9 mi) 4-6 June 2010 First Expressway of Tamil Nadu. Mumbai Trans Harbour Link: Mumbai, Navi Mumbai: Maharashtra: 21.8 km (13.5 mi) 6 January 2024 Belghoria Expressway: Kolkata: West Bengal: 16 km (9.9 mi) 4 2008 Chatrapati Shivaji Maharaj Uddanpul (Nashik Freeway) Nashik: Maharashtra: 16 km (9.9 mi) 4-6 June 2013

  9. Lambda calculus - Wikipedia

    en.wikipedia.org/wiki/Lambda_calculus

    Lambda calculus is Turing complete, that is, it is a universal model of computation that can be used to simulate any Turing machine. [3] Its namesake, the Greek letter lambda (λ), is used in lambda expressions and lambda terms to denote binding a variable in a function.