Thanks! So instead of using volume of a rectangle, use volume of a trapezoid or a quatdrilateral?? The thing about it is, the whole slope of the entire "bottom" of the pool/shape is messing me up. Will it still work out the same?? I'm just not sure what type of shape looks like that, even a trapezoid. Attached is how I am thinking of the pool.. in the non trapezoid way, how the question makes it sound to be. Is this right?? If not and the trapezoid is what I need, I guess I dont know how it can look like that since it gives a constant width and length. So by this where do I need to start? Thanks so much!!!