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**Prism bases** are equal to regular squares.

**The side faces** of the prism are rectangles.

**The side edges** of the prism are parallel and equal.

**The dimensions of the prism** can be expressed in terms of side length a and height h.

The prism total **surface area** is equal to its lateral surface area and the base's doubled area.

The** formula of the surface area** of a quadrangular prism:

**The volume of a prism** is equal to the product of its height and base area.

The formula of volume of a regular quadrangular prism:

The regular quadrangular prism can be** inscribed into the cylinder**.

The formula for the radius of the cylinder:

The **dual** polyhedron of a direct prism is a bipyramid.

Historically, the concept of "prism" arose from Latin and meant - something sawed.

The animation demonstrates how **two parallel planes cutting** off the excess from the two bases of the prism. From a single workpiece, you can get both the regular prism and an oblique prism.

Geometric dimensions of the finished prism (mm):

Length = 68

Width = 68

Height = 52

Geometric dimensions of the finished prism (mm):

Length = 59

Width = 59

Height = 83

Geometric dimensions of the finished prism (mm):

Length = 43

Width = 43

Height = 110

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