<span>In order to find the volume of any prism, you have the equation V = BH where B is the base area and H is the height. Since the prism is triangular then the base is 1/2bh.
The first and second picture is V = 1/2*6*8*12 V = 288ft</span>³
The third picture is V = 1/2* 12mm(1cm/10mm)*2.5*4 V = 6cm³