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plane geometry

noun, Mathematics.
the geometry of figures whose parts all lie in one plane.
Origin of plane geometry
First recorded in 1740-50 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for plane geometry
Historical Examples
  • She was a quiet girl who was designed like a tall problem in plane geometry.

    At Good Old Siwash George Fitch
  • The figure suggests the case of two circles in plane geometry.

    The Teaching of Geometry David Eugene Smith
  • Not until 1844 did Harvard require any plane geometry for entrance.

    The Teaching of Geometry David Eugene Smith
  • But the introduction to plane geometry is not so easily disposed of.

    The Teaching of Geometry David Eugene Smith
  • Why is it that Pascal, when twelve years old, succeeded in discovering for himself the greater part of plane geometry.

    Reincarnation Swami Abhedananda
  • A Collection of Lemmas, consisting of fifteen propositions in plane geometry.

  • Courses in higher mathematics (plane geometry and trigonometry) were optional as were English history and foreign languages.

    Frying Pan Farm Elizabeth Brown Pryor
  • In his work Euclid placed all of the leading propositions of plane geometry then known, and arranged them in a logical order.

    The Teaching of Geometry David Eugene Smith
  • It was therefore from 1850 to 1875 that plane geometry took a definite place in the American high school.

    The Teaching of Geometry David Eugene Smith
  • As to the fusion of trigonometry and plane geometry little need be said, because the subject is in the doctrinaire stage.

    The Teaching of Geometry David Eugene Smith
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 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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