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.
A plane is a flat surface with no thickness. Our world has three dimensions, but there are only two dimensions on a plane.
In geometry a flat surface is usually called a plane surface, or just a plane. You use it like this.1) If straight lines lie in the same plane they a said to be co-planar.2) If two co-planar straight lines never intersect, they are parallel to each other.
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.
In the mind. A plane is an abstract concept: it is perfectly even (flat) and infinitely long in every direction. A flat surface, such a s desktop or sheet of paper may model it, but these will only be approximations.
a Plane
It means a flat surface.
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.
a plane; a study of geometry is called "plane" geometry.
A plane is a flat surface with no thickness. Our world has three dimensions, but there are only two dimensions on a plane.
Shapes have flat surfaces in plane geometry. They can also be described as two dimensional shapes.
A plane is a flat, closed figure.a flat surface on which a straight line joining any two points on it would wholly lie:
It is a flat two dimensional surface which extends to infinity in all directions.
Look around you. Anything flat represents a plane geometric surface. Plane here means two dimensional; having length and width but not depth. The glass in the window, the top of the table or any other FLAT surface regardless of its shape. It can be square, rectangular, round triangular or duodecahedronal, so long as it is flat it is a plane geometry surface.
In plane geometry, the geometry of a flat surface, parallel lines by definition never meet. However in spherical geometry, the geometry of the surface of a sphere (such as the planet Earth) parallel lines meet at the poles.
In geometry a flat surface is usually called a plane surface, or just a plane. You use it like this.1) If straight lines lie in the same plane they a said to be co-planar.2) If two co-planar straight lines never intersect, they are parallel to each other.
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.