Etymology
The word "lune" comes from the Latin word "luna," which means "moon."
Meaning
A lune is a plane figure bounded by two circular arcs on opposite sides of a common chord. The arcs lie in different planes and intersect at the endpoints of the chord.
Origin
The concept of a lune goes back to ancient Greek mathematics. The mathematician Menaechmus (c. 350-270 BCE) is credited with discovering that the area of a lune is equal to the area of the difference between the two circular sectors that form it. This discovery was important in the development of calculus and the study of integrals.
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