Given:
Given that the area of the base of the triangular prism is 18 square inches.
The height of the prism is 4.5 inches.
We need to determine the volume of the triangular prism.
Volume of the triangular prism:
The volume of the triangular prism can be determined using the formula,

where
is the area of the base of the triangular prism and h is the height of the triangular prism.
Substituting the values, we have;


Thus, the volume of the triangular prism is 81 cubic inches.