Lune -- from Wolfram MathWorld
A lune is a plane figure bounded by two circular arcs of unequal radii, i.e., a crescent. (By contrast, a plane figure bounded by two circular arcs of equal radius is known as a lens.) For circles of radius a and b>a whose centers are separated by a distance c, the area of the lune is given by (1) where Delta=1/4sqrt((a+b+c)(b+c-a)(c+a-b)(a+b-c)) (2) is the area of the triangle with side lengths a, b, and c. The second of these can be obtained directly by subtracting the areas of
Circle - mykrak literatura publicystyka
![](https://www.tandfonline.com/cms/asset/514b7fcd-3b63-4c34-98d4-92a9a876e304/oama_a_1179246_f0012_oc.gif)
Full article: Exploring Riemann's functional equation
LU Decomposition -- from Wolfram MathWorld
What are the advantages of using area formulas to calculate
![](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Congettura_Mertens.png/640px-Congettura_Mertens.png)
Гипотеза Мертенса — Википедия
Circle - mykrak literatura publicystyka
How could you construct two equal overlapping circles such that
![](https://www.mdpi.com/horticulturae/horticulturae-05-00060/article_deploy/html/images/horticulturae-05-00060-g001-550.jpg)
Horticulturae, Free Full-Text
Lucas Polynomial -- from Wolfram MathWorld
Lune -- from Wolfram MathWorld
Lens -- from Wolfram MathWorld