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  2. Trigonometry - Wikipedia

    en.wikipedia.org/wiki/Trigonometry

    Trigonometry (from Ancient Greek τρίγωνον (trígōnon) 'triangle' and μέτρον (métron) 'measure') [1] is a branch of mathematics concerned with relationships between angles and side lengths of triangles.

  3. Perimeter - Wikipedia

    en.wikipedia.org/wiki/Perimeter

    Perimeter is the distance around a two dimensional shape, a measurement of the distance around something; the length of the boundary. A perimeter is a closed path that encompasses, surrounds, or outlines either a two dimensional shape or a one-dimensional length.

  4. Incircle and excircles - Wikipedia

    en.wikipedia.org/wiki/Incircle_and_excircles

    In geometry, the incircle or inscribed circle of a triangle is the largest circle that can be contained in the triangle; it touches (is tangent to) the three sides. The center of the incircle is a triangle center called the triangle's incenter.

  5. Heptagonal triangle - Wikipedia

    en.wikipedia.org/wiki/Heptagonal_triangle

    Each of the fourteen congruent heptagonal triangles has one green side, one blue side, and one red side.. In Euclidean geometry, a heptagonal triangle is an obtuse, scalene triangle whose vertices coincide with the first, second, and fourth vertices of a regular heptagon (from an arbitrary starting vertex).

  6. Edmund P. Giambastiani, Jr. - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/edmund-p-giam...

    From October 2009 to December 2012, if you bought shares in companies when Edmund P. Giambastiani, Jr. joined the board, and sold them when he left, you would have a 45.5 percent return on your investment, compared to a 34.9 percent return from the S&P 500.