Editing Dimension (section)

===Spatial dimensions===
Classical physics theories describe three [[size|physical dimension]]s: from a particular point in [[space]], the basic directions in which we can move are up/down, left/right, and forward/backward. Movement in any other direction can be expressed in terms of just these three. Moving down is the same as moving up a negative distance. Moving diagonally upward and forward is just as the name of the direction implies ''i.e.'', moving in a [[linear combination]] of up and forward. In its simplest form: a line describes one dimension, a plane describes two dimensions, and a cube describes three dimensions. (See [[Space]] and [[Cartesian coordinate system]].)

{| class="wikitable" style="margin:auto;text-align:center;"
|-
!style="width:5em;"| {{longitem|Number of <br />dimensions}}
! Example co-ordinate systems
|-
| [[One-dimensional space|1]] ||
{| border="0"
|- style="vertical-align:bottom;line-height:2.0em;"
!style="padding-right:1.0em;"| [[File:Coord NumberLine.svg|120px|Number line]]<br />[[Number line]]
! [[File:Coord Angle.svg|120px|Angle]]<br />[[Angle]]
|}
|-
| [[Plane (mathematics)|2]] ||
{|
|- style="line-height:3.0em;"
!style="padding:1.0em 1.0em 0 0;"| [[File:Coord-XY.svg|120px]]<br />[[Cartesian coordinate system|Cartesian]]&nbsp;<span style="font-size:90%;font-weight:normal;">(two-dimensional)</span>
!style="padding:1.0em 1.0em 0 0;"| [[File:Coord Circular.svg|120px|Polar system]]<br />[[Polar coordinate system|Polar]]
!style="padding:1.0em 1.0em 0 0;"| [[File:Coord LatLong.svg|120px|Geographic system]]<br />[[Geographic coordinate system|Latitude and longitude]]
|}
|-
| [[Three-dimensional space|3]] ||
{| border="0"
|- style="line-height:3.0em;"
!style="padding:1.0em 1.0em 0 0;"| [[File:Coord XYZ.svg|120px|Cartesian system (3d)]]<br />Cartesian&nbsp;<span style="font-size:90%;font-weight:normal;">(three-dimensional)</span>
!style="padding:1.0em 1.0em 0 0;"| [[File:Cylindrical Coordinates.svg|120px|Cylindrical system]]<br />[[Cylindrical coordinate system|Cylindrical]]
!style="padding:1.0em 1.0em 0 0;"| [[File:Spherical Coordinates (Colatitude, Longitude).svg|120px|Spherical system]]<br />[[Spherical coordinate system|Spherical]]
|}
|}