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plane geometry

noun, Mathematics.
the geometry of figures whose parts all lie in one plane.
Origin of plane geometry
1740-50 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for plane-geometry

plane geometry

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
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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 © 2002. Published by Houghton Mifflin. All rights reserved.
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plane-geometry in Culture

plane geometry definition

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 American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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