I wante to define several functions, all of them with the same arguments, for example:

f[a_, b_, c_]:= ...
g[a_, b_, c_]:= ...
h[a_, b_, c_]:= ...

How can I do this by using something like args = {a,b,c}?

So, having something like

f[arg_]:= ...
g[arg_]:= ...
h[arg_]:= ...