What is the term for a shape that encloses another shape?

The term for a shape that encloses another shape is "circumscribed polygon." This term refers to a polygon that surrounds another geometric figure, such as a circle or another polygon, by touching it at certain points but not intersecting it. For example, if you have a circle, a circumscribed polygon would be a polygon whose vertices all lie on the circumference of the circle. This relationship emphasizes the idea of one shape completely encompassing another, which is fundamental in geometry when discussing the comparative properties of shapes.

In contrast, an inscribed polygon refers to a shape located entirely within another shape, where all the vertices of the inscribed polygon touch the boundary of the larger shape. The other options, like circular shape and vertex configuration, do not pertain directly to the concept of enclosing or surrounding another shape. Therefore, "circumscribed polygon" is the appropriate term that accurately describes the relationship between two shapes where one encloses another.