Chapter 11 - Surface Area and Volume - 11-4 Volumes of Prisms and Cylinders - Practice and Problem-Solving Exercises - Page 721: 12

720$mm^{3}$

To find the volume of a triangular prism, we simply 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: V=$\frac{1}{2}$(12mm)(20mm)(6mm) We multiply to find the volume: V=720$mm^{2}$