pyramid. Base is a square, but each of the 4 sides is a triangle.
Pyramid
Cylinder
It is a squared based pyramid that fits the given description.
No. I has 3 triangle faces and one square face.
There are very many possible shapes: a square based pyramid a triangular prism a square anti-prism a cuboctahedron a rhombicuboctahedron and possibly more. See link for images.
A square pyramid! The base of the pyramid is a square and it has four trianglular faces that meet at the vertex of the pyramid.pyramid
A 3D shape with one base and three faces can only have triangular faces.
A triangle couldn't.
It is a regular quadrilateral which is a square
triangle and square 4 triangles one square
A square pyramid
triangular prism