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  2. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    More formulas of this nature can be given, as explained by Ramanujan's theory of elliptic functions to alternative bases. Perhaps the most notable hypergeometric inversions are the following two examples, involving the Ramanujan tau function τ {\displaystyle \tau } and the Fourier coefficients j {\displaystyle \mathrm {j} } of the J-invariant ...

  3. List of formulas in elementary geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    The basic quantities describing a sphere (meaning a 2-sphere, a 2-dimensional surface inside 3-dimensional space) will be denoted by the following variables r {\displaystyle r} is the radius, C = 2 π r {\displaystyle C=2\pi r} is the circumference (the length of any one of its great circles ),

  4. Area of a circle - Wikipedia

    en.wikipedia.org/wiki/Area_of_a_circle

    Another proof that uses triangles considers the area enclosed by a circle to be made up of an infinite number of triangles (i.e. the triangles each have an angle of dπœƒ at the centre of the circle), each with an area of ⁠ 1 / 2 ⁠ · r 2 · dπœƒ (derived from the expression for the area of a triangle: ⁠ 1 / 2 ⁠ · a · b · sinπœƒ ...

  5. Surface area - Wikipedia

    en.wikipedia.org/wiki/Surface_area

    A sphere of radius r has surface area 4πr 2.. The surface area (symbol A) of a solid object is a measure of the total area that the surface of the object occupies. [1] The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc length of one-dimensional curves, or of the surface area for polyhedra (i.e., objects with ...

  6. Thanks to conference realignment, the Alamo Bowl will be a ...

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    The Alamo Bowl will be a glorified Big 12 game. The bowl announced which schools it is considering for the Dec. 28 game on Thursday.And all four of them are in the Big 12. Iowa State, BYU, Arizona ...

  7. Spherical shell - Wikipedia

    en.wikipedia.org/wiki/Spherical_shell

    An approximation for the volume of a thin spherical shell is the surface area of the inner sphere multiplied by the thickness t of the shell: [2] V ≈ 4 π r 2 t , {\displaystyle V\approx 4\pi r^{2}t,}

  8. Why Caitlin Clark Was 'So Upset' in the Moments After ... - AOL

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    During an appearance on the Nov. 5th episode of the Fresh Talk podcast — which also served as a reunion for Clark, ... She averaged 19.2 points, 8.4 assists (a WNBA high, per the league), 5.7 ...

  9. Mortgage and refinance rates for Dec. 2, 2024: Average rates ...

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    Rates on a 15-year mortgage stand at an average 6.18% for purchase and 6.22% for refinance, down 6 basis points from 6.24% for purchase and 4 basis points from 6.26% for refinance this time last week.

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