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Parallelepiped

A parallelepiped is a solid formed by six parallelograms. A box is a typically example of a parallelepiped.

A rectangular parallelepiped, where all angles are 90˚, is also called a rectangular cuboid or sometimes just a cuboid.

The surface area of a cuboid

The surface area of a rectangular parallelepiped is given by the following formula:
Drawing of a rectangular parallelepiped

A=2*(a*b+a*c+b*c)

where A is the surface area and a, b and c is height, width and depth.

Volume of a cuboid

The volume of a rectangular parallelepiped is given by:

V=a*b*c

where V is the volume and a, b and c is height, width and depth.

Volume of an oblique parallelepiped

Drawing of an oblique parallelepiped
The volume of an oblique parallelepiped (nonrectangular parallelepiped) is given by:

V=a*b*c*sin(theta)

where V is the volume. a, b and c is height, width and depth. θ is one of the oblique angles (the acute or the obtuse angle).