As we move into orbit our flat world springs into life, whether by aircraft or spacecraft. The world grows small and it gives us a feeling of freedom.
Prior Knowledge & Skills
To get into three dimensional position we need a decent grasp of two dimensional position. The basics are much the same and can be extrapolated to fit the 3D world. A knowledge of 3D shape helps us with our spatial awareness as we explore this space. We also require use of number and measurement to identify our position in the X, Y and Z.
Following on from 2D position, we add a dimension in the vertical plane. Shapes can be superimposed to visualise wire-frame cubes and cuboids. Dimensions can be calculated using Pythagoras' principles. Movement including translation and rotation can be modeled.
Any sort of physical modelling requires computation in three dimensions. Where we have 3D objects we need the principles of positioning and movement to go with them. Engineers and scientists need to understand how objects relate in this three dimensional world.
Get an idea of 3D position from this site: