The bases of a triangular prism or right triangular prism are actually two triangles that we can find on each side of the prism.

**These two** **triangles**** are always equal. Moreover, they can be any type of triangle. Let's review the types of triangles we know:**

We use the bases of the prism to calculate the volume, the lateral surface area, and the surface area of the prism.

From the above examples we can see that triangular prisms have five faces, two of them are called the bases of the prism, and the remaining three are the lateral faces.

We can classify the prism by the number of sides its base has. For example, if the base has three sides we will have a triangular prism, if the polygon has four sides we can have a quadrangular or rectangular prism.