\magnification=1200 \hsize=4in \overfullrule=0pt \input amssym %\def\frac#1 #2 {{#1\over #2}} \def\emph#1{{\it #1}} \def\em{\it} \nopagenumbers \noindent % % {\bf Catarina P. Avelino and Altino F. Santos} % % \medskip \noindent % % {\bf Spherical f-Tilings by Scalene Triangles and Isosceles Trapezoids III} % % \vskip 5mm \noindent % % % % The study of the dihedral f-tilings of the sphere $S^2$ whose prototiles are a scalene triangle and an isosceles trapezoid was initiated in parts I and II. In this paper we complete this classification presenting the study of all dihedral spherical f-tilings by scalene triangles and isosceles trapezoids in the remaining case of adjacency. A list containing all the f-tilings obtained in this paper is presented. It is composed by isolated tilings as well as discrete and continuous families of tilings. The combinatorial structure is also achieved. \bye .