Plane Geometry

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plane geometry

[′plān jē′äm·ə·trē]
The geometric study of the figures in the euclidean plane such as lines, triangles, and polygons.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Plane Geometry


the branch of elementary geometry that studies the properties of figures in the plane. The term is usually understood to refer to geometry courses taught in secondary schools. The subject matter of plane geometry and the method of presentation were established by the Greek mathematician Euclid in the third century B.C..

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.