Rectangular is an adjective and so there is no noun in the question.
To put it another way, a rectangular what?
It is usually a plane shape that forms a boundary of the figure..It is usually a plane shape that forms a boundary of the figure..It is usually a plane shape that forms a boundary of the figure..It is usually a plane shape that forms a boundary of the figure..
There are many plane shapes comprising 4 squares and 2 rectangles but there is no such 3-dimensional shape.
A flat shape.
cube
The phrase that describes the volume of a three-dimensional figure is "the amount of space enclosed within the figure." Volume quantifies how much substance can fit inside the shape, measured in cubic units. Common formulas for calculating volume vary depending on the type of figure, such as length × width × height for a rectangular prism.
It is usually a plane shape that forms a boundary of the figure..It is usually a plane shape that forms a boundary of the figure..It is usually a plane shape that forms a boundary of the figure..It is usually a plane shape that forms a boundary of the figure..
A three sided closed plane figure (shape) is a triangle.
A polygon is a 2-dimensional shape with 3 or more sidesa closed plane figure with three or more sides that are straight
There are many plane shapes comprising 4 squares and 2 rectangles but there is no such 3-dimensional shape.
A flat shape.
cube
A two-dimensional figure, also called a plane or planar figure, is a set of line segments or sides and curve segments or arcs, all lying in a single plane. The sides and arcs are called the edges of the figure. The edges are one-dimensional, but they lie in the plane, which is two-dimensional. The triangle, the pentagon, the hexagon and the circle are just a few plane figures. Prisms and pyramids, for instance, are three-dimension figures.
Such at figure - as described - could not be made as a solid geometric shape.
A twelve-sided plane figure is called a dodecagon.
a solid figure with five plane surfaces
a face
cuboid, rectangular prism