Communism is the strictly theoretical system imagined by Karl Marx in which all of society, all of economics and all politics are combined into one, perfect, classless, automatic, government-less system based on common ownership of all economic means of production, and social sameness.
The word elliptical is derived from the oval shape known as an ellipse. Many comets have an elliptical orbit around the Sun that brings them closer at some times and farther away at others. The adjective elliptical refers to the shape of an ellipse, which is an elongated circle, stretched into an oval. While it is a mathematical shape, it also is used to describe a way of speaking that cuts out extra, unnecessary language.
In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal (360Â°/4 = 90Â°). It can also be defined as a parallelogram containing a right angle. A rectangle with four sides of equal length is a square. The term oblong is occasionally used to refer to a non-square rectangle. A rectangle with vertices ABCD would be denoted as ABCD.