Plane geometry
Plane Plane, a. [L. planus: cf. F. plan. See {Plan}, a.] Without elevations or depressions; even; level; flat; lying in, or constituting, a plane; as, a plane surface. [1913 Webster]

Note: In science, this word (instead of plain) is almost exclusively used to designate a flat or level surface. [1913 Webster]

{Plane angle}, the angle included between two straight lines in a plane.

{Plane chart}, {Plane curve}. See under {Chart} and {Curve}.

{Plane figure}, a figure all points of which lie in the same plane. If bounded by straight lines it is a rectilinear plane figure, if by curved lines it is a curvilinear plane figure.

{Plane geometry}, that part of geometry which treats of the relations and properties of plane figures.

{Plane problem}, a problem which can be solved geometrically by the aid of the right line and circle only.

{Plane sailing} (Naut.), the method of computing a ship's place and course on the supposition that the earth's surface is a plane.

{Plane scale} (Naut.), a scale for the use of navigators, on which are graduated chords, sines, tangents, secants, rhumbs, geographical miles, etc.

{Plane surveying}, surveying in which the curvature of the earth is disregarded; ordinary field and topographical surveying of tracts of moderate extent.

{Plane table}, an instrument used for plotting the lines of a survey on paper in the field.

{Plane trigonometry}, the branch of trigonometry in which its principles are applied to plane triangles. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • plane geometry — n. the branch of geometry dealing with plane figures …   English World dictionary

  • Plane geometry — In mathematics, plane geometry may mean:*geometry of a plane, *geometry of the Euclidean plane,or sometimes a plane is any flat surface that extends without end in all directions.*geometry of a projective plane, most commonly the real projective… …   Wikipedia

  • plane geometry — noun the geometry of 2 dimensional figures • Topics: ↑mathematics, ↑math, ↑maths • Hypernyms: ↑geometry * * * noun : a branch of elementary geometry that deals with plane figures * * * Math. the geometry of figures whose parts all lie in one… …   Useful english dictionary

  • plane geometry — plane′ geom′etry n. math. the geometry of figures whose parts all lie in one plane • Etymology: 1740–50 …   From formal English to slang

  • plane geometry — plane ge.ometry n [U] the study of lines, shapes etc that are ↑two dimensional (=with measurements in only two directions, not three) …   Dictionary of contemporary English

  • Plane (geometry) — Two intersecting planes in three dimensional space In mathematics, a plane is a flat, two dimensional surface. A plane is the two dimensional analogue of a point (zero dimensions), a line (one dimension) and a space (three dimensions). Planes can …   Wikipedia

  • plane geometry — noun Date: 1747 a branch of elementary geometry that deals with plane figures …   New Collegiate Dictionary

  • plane geometry — Math. the geometry of figures whose parts all lie in one plane. [1740 50] * * * …   Universalium

  • plane geometry — /pleɪn dʒiˈɒmətri/ (say playn jee omuhtree) noun the geometry of figures whose parts all lie in one plane …   Australian English dictionary

  • plane geometry — field in geometry that deals with one dimensional figures …   English contemporary dictionary

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