## Geometry: Common Core (15th Edition)

22.5 $in^{3}$
The legs of a 45-45-90 triangle are the same. To find the volume of a triangular prism, we use the formula V=$\frac{1}{2}$bhl, where b is the base, h is the height, and l is the length. We plug in the values for base, height, and length, given: V=$\frac{1}{2}$(5in)(1.8in)(5in) We multiply to find the volume: V=22.5$in^{3}$