I think the "feasible region" or "feasible set" refers to a region in a linear programming problem where every point satisfies every condition. :))

Feasible Region

It is called the Feasible Region. 

Feasible Region 

Feasible region

FEASIBLE REGION

An area where all points in that area fulfills all constraints is called the Feasible Region.

Feasible regions determine an area that fulfills all constraints. 

Feasible Region is the set of all points that satisfy the constraints.

feasible region

-Feasible Region.

 Feasible Region. 

Feasible Region

Feasible Region

Feasible Region 

FEASIBLE REGION

feasible region

Feasible Region

Feasible Region 

Feasible region

Feasible Region

Feasible Region

Feasible region

Feasible region

Feasible region

Feasible Region