Poincare Disk Model
The Poincaré disk model is a model of n-dimensional hyperbolic geometry in which the points of the geometry are in an n-dimensional disk, or unit ball, and the straight lines consist of all segments of circles contained within the disk that are orthogonal to the boundary of the disk, plus all diameters of the disk.
Word cloud or tag cloud is a graphical representation of word frequency. Presents a picture of the most common words used with those used more often displayed larger and are typically listed alphabetically.
A square is a plane figure with four equal straight sides and four right angles.