Start over a triangle prism has a height of 9 in the triangle base has a base of 3 in in the heights of 8 in find the volume of the prism

The formula to get the volume of the triangular prism is;

V = B x H1 x H2

where;

B = is the area of the base of the triangle
H1 and H2= are the height of the triangle and the height of the triangular prism.

now, to find the area of the base simply use the formula

A = 1/2 B x H

where B is the value of the base and H is the value of the height of the triangle.

given the formula we can derive another formula to get the volume of the triangular prism.

V = 1/2 B x H1 x H2

given the formula, you can now substitute the values 
.

V = 1/2 (3 in. x 8 in. x 9 in.)

V = 1/2 (216 in.^3)   

V = (216 in.^3)/2

V = 108 in.^3   this is the final answer