'''Cylindrical coordinates''' refers to a three-dimensional coordinate system used to describe the location of a point in space based on the distance from the origin in the x-y plane "r", the angle measured in the x-y plane between the point and the x axis "θ", the distance perpendicular to the x-y plane: (r,θ,z). | '''Cylindrical coordinates''' refers to a three-dimensional coordinate system used to describe the location of a point in space based on the distance from the origin in the x-y plane "r", the angle measured in the x-y plane between the point and the x axis "θ", the distance perpendicular to the x-y plane: (r,θ,z). |