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  2. Triangular number - Wikipedia

    en.wikipedia.org/wiki/Triangular_number

    The final digit of a triangular number is 0, 1, 3, 5, 6, or 8, and thus such numbers never end in 2, 4, 7, or 9. A final 3 must be preceded by a 0 or 5; a final 8 must be preceded by a 2 or 7. In base 10 , the digital root of a nonzero triangular number is always 1, 3, 6, or 9.

  3. Windows Calculator - Wikipedia

    en.wikipedia.org/wiki/Windows_Calculator

    A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.

  4. Incircle and excircles - Wikipedia

    en.wikipedia.org/wiki/Incircle_and_excircles

    [3] The center of the incircle, called the incenter , can be found as the intersection of the three internal angle bisectors . [ 3 ] [ 4 ] The center of an excircle is the intersection of the internal bisector of one angle (at vertex A , for example) and the external bisectors of the other two.

  5. Calculator (Apple) - Wikipedia

    en.wikipedia.org/wiki/Calculator_(Apple)

    Though no higher math capability was included, third-party developers provided upgrades, and Apple released the Graphing Calculator application with the first PowerPC release (7.1.2) of the Mac OS, and it was a standard component through Mac OS 9. Apple also ships a different application with macOS called Grapher for this purpose. [2]

  6. El Triángulo - Wikipedia

    en.wikipedia.org/wiki/El_Triángulo

    Área de Promoción El Triángulo is a town in Malvinas Argentinas Partido of Buenos Aires Province, Argentina.

  7. Triángulo (TV series) - Wikipedia

    en.wikipedia.org/wiki/Triángulo_(TV_series)

    Triángulo (English: Triangle) is a Mexican telenovela directed by Arturo Ripstein and Sergio Muñoz and produced by Ernesto Alonso for Televisa in 1992. [ 1 ] Daniela Castro and Eduardo Palomo starred as protagonists, while Kenia Gazcón, Guillermo García Cantú and Patricia Reyes Spíndola starred as antagonists.