Plane Geometry

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plane geometry

[′plān jē′äm·ə·trē]
(mathematics)
The geometric study of the figures in the euclidean plane such as lines, triangles, and polygons.

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..