From Conservapedia - Reading time: 1 min
Three-dimensional, tri-dimensional or 3D in geometric mathematics is a generalized description of cubed space.[1] Euclidean space describes a two-dimensional plane. A three-dimensional Euclidean plane is determined by three coordinates; X, Y, & Z or Rn or n = 3.[2] Common cube coordinates are measured by the three planes of width, height, and depth.