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# plane geometry

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noun Mathematics.

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

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## Origin of plane geometry

First recorded in 1740–50

## Words nearby plane geometry

Planck's law, Planck's radiation law, plane, plane angle, plane chart, plane geometry, plane iron, planeload, plane of incidence, plane polarization, planer

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use plane geometry in a sentence

## 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

## Scientific definitions for plane geometry

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.

## Cultural definitions for plane geometry

## notes for plane geometry

Plane geometry is one of the oldest branches of mathematics.

## notes for plane geometry

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.