Again, the normal shock is a one-dimensional problem,
thus, only one parameter is required (to
solve the problem).
Oblique shock is a two-dimensional problem and
two properties must be provided so a solution can be found.
Probably, the most useful properties
are upstream Mach number,
and the deflection angle,
which create a somewhat complicated
mathematical procedure, and this will be discussed later.
Other combinations of properties provide a relatively simple
mathematical treatment, and the solutions of selected pairs and
selected relationships will be presented.