the geometry of figures whose parts all lie in one plane.
the study of the properties of and relationships between plane curves, figures, etc
The mathematical study of geometric figures whose parts lie in the same plane, such as polygons, circles, and lines.
The study of two-dimensional figures (figures that are confined to a plane).
Note: Plane geometry is one of the oldest branches of mathematics.
Note: The Greek mathematician Euclid was the first to study plane geometry carefully. His book Elements was the standard plane geometry textbook for centuries.
noun, Carpentry. 1. the blade of a plane.
- Plane joint
plane joint n. A synovial joint in which the opposing surfaces are nearly planes and in which there is only a slight, gliding motion. Also called arthrodia, arthrodial joint, gliding joint.
[pleyn-lohd] /ˈpleɪnˌloʊd/ noun 1. the amount of people or cargo an airplane can carry.
noun, Optics. 1. a plane determined by a given ray, incident on a surface, and the normal at the point where the incident ray strikes the surface.