Two dimensional geometry is called "plane geometry" meaning that it occurs on a single surface or plane. The objects used in plane geometry are called plane figures.
There are infinitely many plane figures, not just five! A circle, ellipse, A triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, and on and on. And then there are mixed figures such as a semicircle, a segment of an ellipse. Not forgetting plane figures that have "random" boundaries.
Presumably it is simply geometry. However, plane geometry is geometry which is limited to objects with up to two dimensions, that is, objects that lie in a plane - or on a flat surface.
Geometry.
Point ; Line ; Plane - Remember the Point-Line-Plane Postulate
Two dimensional geometry is called "plane geometry" meaning that it occurs on a single surface or plane. The objects used in plane geometry are called plane figures.
solid geometry deals with 3 dimensional figures while plane geometry deals with 2 dimensional.
Stars that populate the universe are not plane figures. They are oblate spheres.If, by a star, you mean a many-pointed flat figure then yes, it is.
Herbert Busemann has written: 'Recent synthetic differential geometry' -- subject(s): Differential Geometry 'Geometry of Geodesics (Pure & Applied Mathematics)' 'On plane convex figures ..' -- subject(s): Plane Geometry 'The geometry of geodesics' -- subject(s): Curves on surfaces, Differential Geometry, Geodesics (Mathematics)
No because in Geometry, a plane goes on infinitely. No because in Geometry, a plane goes on infinitely.
There are many special figures in geometry and some of them are pyramid, cone, cylinder, sphere, circle, prism, polygon, polyhedron ..... etc
Noncoplanar is a term in geometry referring two or more figures, lines, or points that do not all lie in the same plane.
There are infinitely many of them, and of a fantastically huge variety.
An example is the Cartesian plane where coordinated geometry is plotted
Roy David Gustafson has written: 'Elementary plane geometry' -- subject- s -: Geometry, Plane, Plane Geometry
B Abrahamson has written: 'Notes on plane coordinate geometry' -- subject(s): Coordinates, Geometry, Plane, Plane Geometry
Plane Geometry and Solid Geometry