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.
yes, a square can only exist on a plane in euclidean geometry.
In geometry, a triangle is always found in a prism.
No because in Geometry, a plane goes on infinitely. No because in Geometry, a plane goes on infinitely.
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.
An example is the Cartesian plane where coordinated geometry is plotted
A plane figure is a geometric shape. A plane figure is known as a 2-dimensional shape because it has only length and breadth. The thickness of the plane figure is zero. Any shape that is drawn on paper is known as a plane figure. In the real world, there is no object that represents a plane figure.
A transformation is moving or changing the shape of a figure on the Cartesian plane by a translation, by a reflection, by a rotation or by an enlargment
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
Geometry that is not on a plane, like spherical geometry
one is plane and one is solid