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  2. Polygon triangulation - Wikipedia

    en.wikipedia.org/wiki/Polygon_triangulation

    This number is given by the 5th Catalan number. It is trivial to triangulate any convex polygon in linear time into a fan triangulation, by adding diagonals from one vertex to all other non-nearest neighbor vertices. The total number of ways to triangulate a convex n-gon by non-intersecting diagonals is the (n−2)nd Catalan number, which equals

  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. Heptagon - Wikipedia

    en.wikipedia.org/wiki/Heptagon

    The area (A) of a regular heptagon of side length a is given by: A = 7 4 a 2 cot ⁡ π 7 ≃ 3.634 a 2 . {\displaystyle A={\frac {7}{4}}a^{2}\cot {\frac {\pi }{7}}\simeq 3.634a^{2}.} This can be seen by subdividing the unit-sided heptagon into seven triangular "pie slices" with vertices at the center and at the heptagon's vertices, and then ...

  5. Lists of shapes - Wikipedia

    en.wikipedia.org/wiki/Lists_of_shapes

    Lists of shapes cover different types of geometric shape and related topics. They include mathematics topics and other lists of shapes, such as shapes used by drawing or teaching tools. They include mathematics topics and other lists of shapes, such as shapes used by drawing or teaching tools.

  6. Trump picks Navarro to be senior counselor for trade and ...

    www.aol.com/news/trump-picks-navarro-senior...

    WASHINGTON (Reuters) -U.S. President-elect Donald Trump said on Wednesday he had picked Peter Navarro to be senior counselor for trade and manufacturing. Navarro served as head of a newly created ...

  7. Doctor accused of abusing Indiana University athletes invokes ...

    www.aol.com/doctor-accused-abusing-indiana...

    The former Indiana University basketball team doctor accused of sexually assaulting players back in the 1990s invoked his Fifth Amendment right against self-incrimination dozens of times during a ...

  8. Area - Wikipedia

    en.wikipedia.org/wiki/Area

    A shape with an area of three square metres would have the same area as three such squares. In mathematics, the unit square is defined to have area one, and the area of any other shape or surface is a dimensionless real number. There are several well-known formulas for the areas of simple shapes such as triangles, rectangles, and circles.

  9. WHO chief released from hospital in Rio de Janeiro - AOL

    www.aol.com/news/chief-hospitalized-rio-janeiro...

    World Health Organization chief Tedros Adhanom Ghebreyesus has been released from Rio de Janeiro's Hospital Samaritano Barra da Tijuca after spending the night under observation, the hospital said.

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