in the euclidean space, "r3" is called orientable if a two-dimensional figure (for example, ) cannot be moved around the surface and back to where it started so that it looks like its own mirror image (). otherwise the surface is non-orientable. a concept connected to this is chirality. this means that no matter what, a human right hand, cannot be rotated in such a way that it becomes a human left hand. the right hand is therefore orientable.