Definition

Noun: A triangular prism is a three-dimensional geometric solid. It has two parallel, congruent triangular faces (called bases) and three rectangular or parallelogram faces (called lateral faces) connecting the corresponding sides of the two triangles.

Usage

The term is used to describe a specific polyhedron in geometry, engineering, optics, and everyday objects. * In geometry class, we learned to calculate the volume of a triangular prism. * The classic roof shape of a house often forms a triangular prism. * Some optical devices use a triangular prism to refract light.

Advanced Usage

• Right Triangular Prism: A specific type where the lateral faces are rectangles and the edges joining the bases are perpendicular to them.
  • A right triangular prism has rectangular lateral faces, while an oblique one has parallelograms.
• In technical contexts, it can be part of compound terms describing components.
  • The assembly required an aluminum triangular prism support.

Variants and Related Words

• Prism (n): The general class of solids with two congruent, parallel polygonal bases and parallelogram lateral faces. A triangular prism is one type.
• Polyhedron (n): A solid figure with many plane faces, a category which includes prisms.

Synonyms

• Triangular-based prism: A more descriptive synonym.
• 3D triangle: An informal, non-technical term.

Related Phrases

• Net of a triangular prism: The two-dimensional pattern that can be folded to form the solid.
  • The students drew the net of a triangular prism for their project.
• Surface area of a triangular prism: The total area of all its faces.
• Volume of a triangular prism: The measure of space it occupies, calculated as (Area of the triangular base) × (Length/Height).

Noun

1. a prism whose bases are triangles