1. Hexagonal pyramid, because the base is a hexagon and the lateral faces all meet up at the same vertex point.
2. Triangular prism. The parallel faces (base faces) are triangles and the lateral faces are rectangles.
3. Tetrahedron. This is a four sided object made of triangles for each face. You can also call this a triangular pyramid as the base is a triangle with the lateral sides meeting at the same vertex.
