Plane loci

Plane loci is the cool, math-nerd way of saying "a set of points that share a common property" in a two-dimensional space. It's like the VIP club of geometry where only points that obey a certain rule can hang out. This term is often used to describe circles, ellipses, lines, and even more complex shapes in the plane.

Dude, you can't just draw random points; they have to be part of the plane loci defined by the equation!