What term describes a figure that is entirely enclosed inside another figure?

The term that accurately describes a figure that is entirely enclosed inside another figure is "inscribed." When a shape is inscribed within another, it means that all the vertices of the inner figure touch the sides of the outer figure, and it fits perfectly within the outer shape without any part of it extending outside.

For example, a circle can be inscribed within a square if the circle touches the square at the midpoint of each side. This concept is important in geometry, particularly when discussing properties of shapes and their relationships to one another.

While "embedded" and "encompassed" might suggest some form of interior placement, they don't convey the precise mathematical relationship of inscribing, which specifically denotes a figure fitting perfectly within another. "Surrounded," on the other hand, implies that the outer figure encircles the inner one, but again lacks the rigorous definition found with "inscribed."