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  2. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    where A is the area of an epicycloid with the smaller circle of radius r and the larger circle of radius kr (), assuming the initial point lies on the larger circle. A = ( − 1 ) k + 3 8 π a 2 {\displaystyle A={\frac {(-1)^{k}+3}{8}}\pi a^{2}}

  3. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    The largest cube that can pass through a 4D hypercube. ... 6, 1, 1, 8, 1, 1, 10 ... for rational x greater than or equal to one. before 1996 Metallic mean + + before ...

  4. Leibniz formula for π - Wikipedia

    en.wikipedia.org/wiki/Leibniz_formula_for_π

    In mathematics, the Leibniz formula for π, named after Gottfried Wilhelm Leibniz, states that = + + = = +,. an alternating series.. It is sometimes called the Madhava–Leibniz series as it was first discovered by the Indian mathematician Madhava of Sangamagrama or his followers in the 14th–15th century (see Madhava series), [1] and was later independently rediscovered by James Gregory in ...

  5. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number π (/ p aɪ / ⓘ; spelled out as "pi") is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter.It appears in many formulae across mathematics and physics, and some of these formulae are commonly used for defining π, to avoid relying on the definition of the length of a curve.

  6. Indiana pi bill - Wikipedia

    en.wikipedia.org/wiki/Indiana_Pi_Bill

    The Indiana pi bill was bill 246 of the 1897 sitting of the Indiana General Assembly, one of the most notorious attempts to establish mathematical truth by legislative fiat. Despite its name, the main result claimed by the bill is a method to square the circle .

  7. Google's Pi Day Map Reveals the Most Popular Pies in ... - AOL

    www.aol.com/lifestyle/googles-pi-day-map-reveals...

    Did you know that there's a day dedicated to pie? Or should we say Pi! March 14th marks the annual Pi Day, a day dedicated to honoring the mathematical constant pi or π (aka 3.14).The day is also ...

  8. Approximations of π - Wikipedia

    en.wikipedia.org/wiki/Approximations_of_π

    At about the same time, the Egyptian Rhind Mathematical Papyrus (dated to the Second Intermediate Period, c. 1600 BCE, although stated to be a copy of an older, Middle Kingdom text) implies an approximation of π as 256 ⁄ 81 ≈ 3.16 (accurate to 0.6 percent) by calculating the area of a circle via approximation with the octagon. [5] [12]

  9. (3.)14 Ways to Celebrate Pi Day (Besides Eating a Big Slice ...

    www.aol.com/3-14-ways-celebrate-pi-130058864.html

    The post (3.)14 Ways to Celebrate Pi Day (Besides Eating a Big Slice of Pie!) appeared first on Reader's Digest. (3.)14 Ways to Celebrate Pi Day (Besides Eating a Big Slice of Pie!) Skip to main ...