Baby Names associated with Violet for Girls. Usage of these girl names was at its apex during the years 1910-1919 (usage of 0.1704%) and is somewhat lower today (usage 0.0573%, â¼ 66.4%), with names such as Yolanda, Ione and Iola becoming less stylish.
A rotation (or turn) is a transformation that turns a line or a shape around a fixed point. This point is called the center of rotation. We usually measure the number of degrees of rotation of a shape in a counterclockwise direction.
Curl (mathematics) In vector calculus, the curl is a vector operator that describes the infinitesimal rotation of a 3-dimensional vector field. At every point in the field, the curl of that point is represented by a vector. The attributes of this vector (length and direction) characterize the rotation at that point.