It would most commonly be called a box. Properly, it is called a rectangular prism. It is also a right-angled parallelepiped.
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"rectangle"
It is a triangular prism
symmetry in rectangle?
a 3-d rectangle A rectangular prism is a rectangle like in 3-d. a rectangular prisim is a recangle that is 3D a rectangular prism is a rectangle but in 3-d
Any rectangle whose sides are in the ratio 2:3. For example, in a 6x9 rectangle, the width (6) is two-thirds of the height (3), so it is similar to the 2x3 rectangle.