ruleta 15
1º_ It is the instrument and the game that uses it to randomly choose an option from a known group. The typical roulette of betting casinos has on a table a cylinder or plate with a wheel of numbered edges by which a small ball is rolled while it is spinning, until at some point they stop with the ball on a number, which is the chosen one. The name is French for roulette ("wheel"), as it is smaller than other versions such as the "Ferris wheel". Watch Russian Roulette. 2º_ In mathematics it is a type of plane curve that graphs the displacement of a rotating point.