A tetrahedron.
A cube
It is a cube.
a square, a rectangular solid
A cube
Triangular Prism Triangular Prism 5 faces, 9 edges 6 vertices
This is an impossible three-dimensional figure. A pyramid has 5 faces and 8 edges but has 5 corners, not 4. A 4-cornered three-dimensional figure has only one itteration: that of a 4 sided pyramid of 6 edges. Since your shape is 5 sided with 8 edges I would say you have got a number wrong there somewhere.
A cube or a cuboid would fit the given description
triangular pyramid
A cube.
A three sided pyramid has four sides and six edges (think four sided die used in role playing games).
In geometry, a rhomboid is a cube like three-dimensional figure with faces that are called rhombi. It has 6 rhombi faces, 12 edges and 8 vertices.
a cube