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  2. Solution of triangles - Wikipedia

    en.wikipedia.org/wiki/Solution_of_triangles

    Solution of triangles (Latin: solutio triangulorum) is the main trigonometric problem of finding the characteristics of a triangle (angles and lengths of sides), when some of these are known.

  3. Shoelace formula - Wikipedia

    en.wikipedia.org/wiki/Shoelace_formula

    Shoelace scheme for determining the area of a polygon with point coordinates (,),..., (,). The shoelace formula, also known as Gauss's area formula and the surveyor's formula, [1] is a mathematical algorithm to determine the area of a simple polygon whose vertices are described by their Cartesian coordinates in the plane. [2]

  4. Right triangle - Wikipedia

    en.wikipedia.org/wiki/Right_triangle

    A right triangle ABC with its right angle at C, hypotenuse c, and legs a and b,. A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular, forming a right angle (1 ⁄ 4 turn or 90 degrees).

  5. Spherical trigonometry - Wikipedia

    en.wikipedia.org/wiki/Spherical_trigonometry

    The octant of a sphere is a spherical triangle with three right angles.. Spherical trigonometry is the branch of spherical geometry that deals with the metrical relationships between the sides and angles of spherical triangles, traditionally expressed using trigonometric functions.

  6. MS-13 - Wikipedia

    en.wikipedia.org/wiki/MS-13

    Mara Salvatrucha, commonly known as MS-13, is an international criminal gang and terrorist organization [17] that originated in Los Angeles, California, in the 1980s.. Originally, the gang was set up to protect Salvadoran immigrants from other gangs in the Los Ange

  7. Siku (comics) - Wikipedia

    en.wikipedia.org/wiki/Siku_(comics)

    Siku also works in the computer games industry and as a conceptualist and freelance concept artist. His latest work is The Manga Bible: From Genesis to Revelation , an adaptation of Today's New International Version of the Holy Bible into manga format.

  8. Chen Sisi (actress) - Wikipedia

    en.wikipedia.org/wiki/Chen_Sisi_(actress)

    Sisi Chen was diagnosed with pancreatic cancer in July 2007. She died three months later, on 7 October 2007, aged 69, at Huadong Hospital in her native Shanghai. [1]

  9. Siku (instrument) - Wikipedia

    en.wikipedia.org/wiki/Siku_(instrument)

    The siku is originally from the Aymaras of Peru and Bolivia, where a woman would play her siku as she came down from the mountains.Since the largest siku has every note (A-G), and was too big for the woman, they often got two sikus (usually smaller ones) that would be played together with someone else, so they could play them continuously after each other and thus the scales could fully be played.