Final answer:
The shape of Angela's pillow, described as a wedge with a volume of 0.35 m^3, resembles a pyramid.
Step-by-step explanation:
Angela makes a pillow in the shape of a wedge filled with 0.35 m^3 of fluffy material. A wedge is a triangular shaped three-dimensional object; therefore, the shape of the pillow is most similar to a pyramid.