Prismoid

Prismoid is a geometrical figure that is a type of polyhedron. It is a solid figure whose ends are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.

A prismoid includes prisms and antiprisms, which are a special case of a prismoid. The term "prismoid" is also used to refer to a solid figure that can be divided into such shapes.

Definition

A prismoid is defined as a polyhedron with two parallel faces, known as the bases, and the remaining faces, known as the lateral faces, are parallelograms. The bases are similar and congruent polygons.

Types of Prismoids

There are several types of prismoids, including:

• Prism: A prism is a prismoid whose bases are polygons and whose lateral faces are rectangles.

• Antiprism: An antiprism is a prismoid whose bases are polygons and whose lateral faces are triangles.

• Frustum: A frustum is a prismoid that is the result of cutting a regular polyhedron parallel to its base, thus forming a smaller base and a larger base.

Volume of Prismoids

The volume of a prismoid can be calculated using the formula:

V = h/6 * (B1 + 4M + B2)

where:

• V is the volume
• h is the height
• B1 and B2 are the areas of the two bases
• M is the area of a section midway between the two bases

See Also

• Prism (geometry)
• Antiprism
• Frustum
• Polyhedron
• Parallelogram

References

Prismoid Resources
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