Difference between revisions of "Plane"
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| − | In [[mathematics]], a '''plane''' is a two-[[dimension]]al object that is infinitely [[length | long]] and wide, but has | + | In [[mathematics]], a '''plane''' is a two-[[dimension]]al object that is infinitely [[length | long]] and wide, but has no [[thick]]ness and zero curvature. |
== Euclidean Geometry == | == Euclidean Geometry == | ||
Revision as of 13:01, 9 November 2006
This article is a stub. Help us out by expanding it.
In mathematics, a plane is a two-dimensional object that is infinitely long and wide, but has no thickness and zero curvature.
Euclidean Geometry
In Euclidean geometry, a plane is defined by:
- three non-collinear points
- a line and a point not on the line
- two intersecting lines
- two parallel lines
Properties
A line can intersect a plane in a single point, or it can be in the plane.
Two planes perpendicular to the same line are parallel to eachother.
Two lines perpendicular to the same plane are parallel to eachother.
Two planes can be parallel, or they can intersect in a line.
If two lines are perpendicular to eachother and one of them is in a plane, the other is perpendicular to the plane.
