Volume of a Triangle Prism By: Joseph R. Nicholas Formula for volume V=1/2bhl You will take 1/2 times whatever the base is times whatever the height is times whatever the length is. Now Lets Try It! Remember Your Answer is always CUBED!!!!! 90 Now You Try!!!!!! :P Did you get 144cm^3 One More problem 80 Now You Know How To Find Volume of a Triangular Prism!