plane geometry


noun Mathematics.

the geometry of figures whose parts all lie in one plane.

Origin of plane geometry

First recorded in 1740–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for plane geometry

plane geometry

noun

the study of the properties of and relationships between plane curves, figures, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

plane geometry in Science

plane geometry

The mathematical study of geometric figures whose parts lie in the same plane, such as polygons, circles, and lines.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

plane geometry in Culture

plane geometry

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.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.