Answer:
To find the volume of a triangular prism, you must find the area of the triangle then multiply it by the height of the figure.
Using one of the formulas they give to find the area of a triangle;
A = BH x 1/2
Where 'b' represents the base, and 'h' represents the height (multiply by 1/2 is basically just saying dividing by 2)
Now let's substitute our values from the picture into our formula:-
A = BH x 1/2
A = 6(5.2) x 1/2
A = 31.2 x 1/2
A = 31.2/2
A = 15.6, is the area of this triangle.
Now we multiply the area of the triangle by the height, which is 9.
15.6 x 9
= 140.4 cubic meters (140.4^3 meters).
Ultimately your answer will be, C.