how do you find the volume of a 3D shape

this is very helpful thanks!

did you see it yet? 

Yes, I saw it but it did not look very helpful to the question asker.

Maybe these might be more useful

1)     https://www.youtube.com/watch?v=jgpwhYLm6uo

2)     https://www.youtube.com/watch?v=nZxldpVaQLo

3)     https://www.youtube.com/watch?v=u2TRb5nUnwE

4)     https://www.youtube.com/watch?v=I3vYW5SUp3Y