Beitr\"age zur Algebra und Geometrie Contributions to Algebra and Geometry Volume 36 (1995), No. 2 A. Kripfganz: The Generalized Favard Problem Abstract The present paper deals with a geometrical optimization problem for isoperimetric plane sets contained in a circular sector. For a circle, this problem was solved by J.~M.~Favard. To obtain structural statements methods of distributional optimal control and constrained optimization are used. With respect to sector angles and perimeter length the optimal value function is discussed and the complete solution is founded. .