Square
A pyramid.
A pyramid is a triangular 3D shape. A prism can be rectangular too.
tent & pyramid
A square pyramid triangular prism is not a 3-D shape.
It is neither because a square is a 2 dimensional shape whereas a pyramid and a prism are 3 dimensional shapes.
rectangular prism pyramid
A triangular pyramid, square pyramid, triangular prism,rectangular prism,septagonal prism. Anything that has more than corner.
pentagonal pyramid triangular prism
Triangular Prism, Triangular Pyramid.
A triangle.
A prism or a pyramid
A triangular prism is so called because the shape of the ends is a triangle. A triangular pyramid is so called because the shape of the base is a triangle.