In geometry, a three-dimensional space (3D space, 3-space or, rarely, tri-dimensional space) is a mathematical space in which three values (coordinates) are required to determine the position of a point. Most commonly, it is the three-dimensional Euclidean space, that is, the Euclidean space of dimension three, which models physical space. More general three-dimensional spaces are called 3-manifolds. The term may also refer colloquially to a subset of space, a three-dimensional region (or 3D domain), a solid figure.

• 0D - Zero dimensional space
  • zero
• 1D - One dimensional space
  • Numerical length / meter , meter length
  • Number line , number line
• 2D - two dimensional space
  • Numerical area / meter square meter square area
  • Numerical planes , 2d coordinate shape , computational graphical shape , 2d shape
    • 2D matter does not exist
    • 2D computational graphics
• 3D - three dimensional space
  • numerical volume / meter cube meter cube volume
  • numerical solids , 3d coordinate shape , 3d shape
    • 3D computational models
    • 3D formal shapes
    • 3D matter measures
      • DEFINITE MASS