Answer:
square pyramid
Step-by-step explanation:
It's definitely not rectangular prism because they have faces all with 4 sides, 4 of these faces only have 3 sides. I'm not sure what you mean by triangular pyramid cube. I call this shape a square - based pyramid which has a square base and 4 triangles that join to a point making a pyramid and square pyramid seems like it's just a different name for the same thing.
