**What is a prism?** A prism is a solid with two faces that are parallel and equal. If you cut a cross section of a prism it will look like the two bases. **Prisms are named after the shape of the bases.** A triangular prism has a base in the shape of the triangle. Common prisms are cubes, rectangular prisms, triangular prisms, hexagonal, and many more. You encounter these shapes often in daily life.

**Examples of Prisms**

- Triangular prism
- Rectangular prism
- Pentagonal prism
- Hexagonal prism
- Octagonal prism

**Properties of Prisms**

- The bases of a prism are congruent polygons, and are parallel.
- The Lateral faces are non-parallel sides which connects the 2 bases.
- The edges of a prism are parallel.
- The faces of a prism are polygons.
- The volume of a prism is equal to the area of the base times the height.
- The surface area of a prism is equal to the sum of the areas of the bases and the areas of the sides.

Prisms are used in a variety of applications, including:

- Optics: Prisms are used to bend light, and they are used in a variety of optical devices, such as telescopes, binoculars, and microscopes.
- Architecture: Prisms are used to create beautiful and interesting architectural features, such as skylights and windows.
- Engineering: Prisms are used in a variety of engineering applications, such as bridges and buildings.