Yes
That is a rectangular solid.
A rectangular prism.
By the shape...
It could be a rectangular cuboid prism
a rectangle
A cereal box is a six sided rectangular polyhedron called a rectangular cuboid. Each of its faces has the shape of a rectangle.
U don't know
A cuboid prism
Cuboid.
a cube
Yes
rectangle
That is a rectangular solid.
cube
3-dimensional rectangle.
A rectangular prism.