The volume of a pyramid can be calculated using a known formula.
V=1/3BhIn this formula, B is the area of the base, and h is the height. The base of the pyramid is a triangle with the base of length 9mm and height of length 8.2mm Therefore, the area of the base will be the area of a triangle.
B=1/2( 9)( 8.2)=36.9
The area of the base is 36.9 square millimeters. We are also given that the height is 8.6mm. Let's substitute these values into the formula and calculate V.