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# What is a 3D rectangular object called?

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A three-dimensional rectangular object is called a "cuboid," which means "similar to a cube" or "resembling a cube." It is also referred to as a "rectangular parallelepiped."

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A cuboid contains six plane surfaces, with all of its vertices forming 90-degree angles. Two of a cuboid's properties are volume and surface area. The formula for calculating the volume is V = lwh, where "V" denotes the volume, "l" indicates the length, "w" represents the width and "h" is the cuboid's height. The formula for the surface area is A = 2wl + 2lh + 2hw, where "A" is the surface area. A cuboid can be classified as a "prism" because it has a uniform cross-section along its length.

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## Related Questions

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One term used for a 3D pentagon is a shape called a pentagonal prism. According to Reference.com, this is the polygon that results when you take a pentagon, transcribe a copy of it, and connect the two pentagons using five quadrilateral faces.

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A three-dimensional shape that is made up of four triangles is called a tetrahedron. If it is a regular tetrahedron, then it contains four equilateral triangles as its faces. A regular tetrahedron is also a platonic solid.

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The difference between a rectangular prism and a cubic prism is in the equality of the faces of the prism. All sides of a cubic prism are equal, while a rectangular prism's sides have different measurements.