![spiral of archimedes spiral of archimedes](https://i.ytimg.com/vi/YMAXXQEFqOI/hqdefault.jpg)
Equivalently, in polar coordinates (r, θ) it can be described by the equation with real numbers a and b. It is the locus corresponding to the locations over time of a point moving away from a fixed point with a constant speed along a line that rotates with constant angular velocity. The Archimedean spiral (also known as the arithmetic spiral) is a spiral named after the 3rd-century BC Greek mathematician Archimedes.V polární soustavě souřadnic lze tuto spirálu zapsat rovnicí (až na shodnost). Archimédova spirála je rovinná transcendentní křivka (spirála), jejíž poloměr roste lineárně s velikostí úhlu.