The volume of a prism can be calculated using the following formula.
V=Bh
Here, B is the area of the base and h is the prism's height. The base is a triangle, so we can calculate its area using the formula for area of a triangle. In our case, the triangle's base is 12 inches and the height is 6 inches. Let's find the base's area using these values.
The area of the base is 36 square inches. We are also given that the prism's height equals 9 inches. Let's substitute these values into the formula and solve for V.