"box" is referenced in the pages listed below.

Circumscribed rectangle (or bounding box) is the smallest rectangle that contains all of a given set of points in coordinate geometry
One of the key applications of finding global extrema is in optimizing some quantity, either minimizing or maximizing it. Here, we maximize the volume of a box. Interactive calculus applet.
How to determine the area of a triangle given the coordinates of the three vertices using a bounding rectangle