  The idea of standardised co-ordinates in three-dimensional affine space is
defined, by way of the Standard tetrahedron. By performing an affine map on a
general tetrahedron, we may replace the study of a general tetrahedron over a
specific metrical structure with the study of a specific tetrahedron over a
general metrical structure. Using the framework of Wildberger's rational
trigonometry as well as the definitions of generalised scalar and vector
products in the author's previous work, we will compute the various
trigonometric invariants associated to the Standard tetrahedron, with the
purpose of proving some more complicated results which are difficult to prove
without this mechanism.
