| plane geometry | |
| —n | |
| the study of the properties of and relationships between plane curves, figures, etc | |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| plane geometry
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.