square
A tetrahedron (or triangular pyramid).
A cube. Or a triangular bipyramid.
a rectangular prism
A tetrahedron - ie a triangular pyramid.
is a regular pentagon if all its angles are congruent and is a general pentagon if they are not.
it is a rectangular prism...
A cube perhaps?
No. Usually only opposite sides are congruent.
rectangular prism.It has 6 faces and 12 edges. The 2 bases are congruent to each other, and the remaining 4 faces are congruent to each other, but the bases are not necessarily congruent to the other faces.
A cube is a three dimensional object with all faces squares. A cuboid is a three dimensional object with 4, or all 6, faces rectangles (and not square).
That's called a cube.